Author: "Centrale Lille" / Topic: 0210 nano-technology - Searchworks@Jio Institute Digital Library Search Results

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5,254 results on '"Centrale Lille"'

1. Microwave Optomechanically Induced Transparency and Absorption Between 250 and 450 mK

Author: Sumit Kumar, Dylan Cattiaux, Eddy Collin, Andrew Fefferman, Xin Zhou, Ultra-basses températures (NEEL - UBT), Institut Néel (NEEL), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Nano and Microsystems - IEMN (NAM6 - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), This work was supported by the ERC StG grant UNIGLASS No.714692, STaRS-MOC Project No. 181386 from Region Hauts-de-France, ISITE-MOST Project No. 201050, and the ERC CoG Grant ULT-NEMS No. 647917. The research leading to these results has received funding from the European Union’s Horizon 2020 Research and Innovation Programme, under Grant Agreement No. 824109., European Project: 647917,H2020,ERC-2014-CoG,ULT-NEMS(2015), and European Project: 824109,H2020,H2020-INFRAIA-2018-1,EMP(2019)
Subjects: Quantum Physics, FOS: Physical sciences, Physics::Optics, 02 engineering and technology, Astrophysics::Cosmology and Extragalactic Astrophysics, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, 0103 physical sciences, General Materials Science, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Quantum Physics (quant-ph), 010306 general physics, 0210 nano-technology
Abstract: International audience; High-quality microwave amplifiers and notch-filters can be made from microwave optomechanical systems in which a mechanical resonator is coupled to a microwave cavity by radiation pressure. These amplifiers and filters rely on optomechanically induced transparency (OMIT) and absorption (OMIA), respectively. Such devices can amplify microwave signals with large, controllable gain, high dynamic range and very low noise. Furthermore, extremely narrowband filters can be constructed with this technique. We briefly review previous measurements of microwave OMIT and OMIA before reporting our own measurements of these phenomena, which cover a larger parameter space than has been explored in previous works. In particular, we vary probe frequency, pump frequency, pumping scheme (red or blue), probe power, pump power and temperature. We find excellent agreement between our measurements and the predictions of input/output theory, thereby guiding further development of microwave devices based on nanomechanics.
Published: 2023

2. Objective Assessment of Covid-19 Severity Affecting the Vocal and Respiratory System Using a Wearable, Autonomous Sound Collar

Author: Georges Nassar, S. Bin, Antoine Abche, H. Aziz, Dany Ishac, Sandrine Matta, Elie Karam, Equipe Thermodynamique Equilibre Phases & Anal Avance (Equipe ThEAA), Université Saint-Esprit de Kaslik (USEK), Hospices Civils de Lyon (HCL), University of Balamand [Liban] (UOB), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Matériaux et Acoustiques pour MIcro et NAno systèmes intégrés - IEMN (MAMINA - IEMN), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Renatech Network, University of Balamand - UOB (LIBAN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: Decision support system, medicine.medical_specialty, Coronavirus disease 2019 (COVID-19), Wearable computer, 02 engineering and technology, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, Collar, Objective assessment, [SPI]Engineering Sciences [physics], Physical medicine and rehabilitation, 0103 physical sciences, Medicine, 010301 acoustics, Autonomous sound systems, Sound (medical instrument), Mechanical vari- ables measurement, business.industry, Electromechanical sensors, 021001 nanoscience & nanotechnology, 3. Good health, Sound signal processing, Respiratory failure, Modeling and Simulation, Original Article, Objective evaluation, Mechanical variables measurement, Covid-19, 0210 nano-technology, business
Abstract: Introduction Since the outbreak began in January 2020, Covid-19 has affected more than 161 million people worldwide and resulted in about 3.3 million deaths. Despite efforts to detect human infection with the virus as early as possible, the confirmatory test still requires the analysis of sputum or blood with estimated results available within approximately 30 minutes; this may potentially be followed by clinical referral if the patient shows signs of aggravated pneumonia. This work aims to implement a soft collar as a sound device dedicated to the objective evaluation of the pathophysiological state resulting from dysphonia of laryngeal origin or respiratory failure of inflammatory origin, in particular caused by Covid-19. Methods In this study, we exploit the vibrations of waves generated by the vocal and respiratory system of 30 people. A biocompatible acoustic sensor embedded in a soft collar around the neck collects these waves. The collar is also equipped with thermal sensors and a cross-data analysis module in both the temporal and frequency domains (STFT). The optimal coupling conditions and the electrical and dimensional characteristics of the sensors were defined based on a mathematical approach using a matrix formalism. Results The characteristics of the signals in the time domain combined with the quantities obtained from the STFT offer multidimensional information and a decision support tool for determining a pathophysiological state representative of the symptoms explored. The device, tested on 30 people, was able to differentiate patients with mild symptoms from those who had developed acute signs of respiratory failure on a severity scale of 1 to 10. Conclusion With the health constraints imposed by the effects of Covid-19, the heavy organization to be implemented resulting from the flow of diagnostics, tests and clinical management, it was urgent to develop innovative and safe biomedical technologies. This passive listening technique will contribute to the non-invasive assessment and dynamic observation of lesions. Moreover, it merits further examination to provide support for medical operators to improve clinical management. Supplementary Information The online version contains supplementary material available at 10.1007/s12195-021-00712-w.
Published: 2021

3. Analog programing of conducting-polymer dendritic interconnections and control of their morphology

Author: Fabien Alibart, Anna Susloparova, Sébastien Pecqueur, Kamila Janzakova, Mahdi Ghazal, Yannick Coffinier, Ankush Kumar, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Nanostructures, nanoComponents & Molecules - IEMN (NCM - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), NanoBioInterfaces - IEMN (NBI - IEMN), Laboratoire Nanotechnologies et Nanosystèmes [Sherbrooke] (LN2), Université de Sherbrooke (UdeS)-École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), European Commission: H2020-EU.1.1.ERC project IONOS (# GA 773228-recipient: F.A.)., Renatech Network, European Project: 773228,H2020,ERC-2017-COG,IONOS(2018), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and Université de Lyon-Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon)
Subjects: Bridging (networking), Computer science, Science, General Physics and Astronomy, FOS: Physical sciences, Image processing, 02 engineering and technology, Applied Physics (physics.app-ph), 010402 general chemistry, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, Article, Electrochemistry, Electronic devices, Electronics, [PHYS.COND.CM-DS-NN]Physics [physics]/Condensed Matter [cond-mat]/Disordered Systems and Neural Networks [cond-mat.dis-nn], Biochip, Emulation, Multidisciplinary, Process (computing), General Chemistry, Physics - Applied Physics, Disordered Systems and Neural Networks (cond-mat.dis-nn), [CHIM.MATE]Chemical Sciences/Material chemistry, Condensed Matter - Disordered Systems and Neural Networks, 021001 nanoscience & nanotechnology, Electrical and electronic engineering, 0104 chemical sciences, [SPI.TRON]Engineering Sciences [physics]/Electronics, Neuromorphic engineering, Duty cycle, 0210 nano-technology, Biological system
Abstract: Although materials and processes are different from biological cells’, brain mimicries led to tremendous achievements in parallel information processing via neuromorphic engineering. Inexistent in electronics, we emulate dendritic morphogenesis by electropolymerization in water, aiming in operando material modification for hardware learning. Systematic study of applied voltage-pulse parameters details on tuning independently morphological aspects of micrometric dendrites’: fractal number, branching degree, asymmetry, density or length. Growths time-lapse image processing shows spatial features to be dynamically dependent, and expand distinctively before and after conductive bridging with two electro-generated dendrites. Circuit-element analysis and impedance spectroscopy confirms their morphological control in temporal windows where growth kinetics is finely perturbed by the input frequency and duty cycle. By the emulation of one’s most preponderant mechanisms for brain’s long-term memory, its implementation in vicinity of sensing arrays, neural probes or biochips shall greatly optimize computational costs and recognition required to classify high-dimensional patterns from complex environments., Despite advances in brain-inspired computing, existing electronics use top-down processes that do not compare with neural connections in the brain. Here, the authors report an electrically-tunable electropolymerization process that emulates and controls neural dendritic morphogenesis.
Published: 2021

4. Hexagonal Si−Ge Class of Semiconducting Alloys Prepared by Using Pressure and Temperature

Author: George Serghiou, Gang Ji, Jonathan P. Wright, Reinhard Boehler, Nicholas Odling, Hans J. Reichmann, Monika Koch-Müller, Daniel J. Frost, Wolfgang Morgenroth, University of Edinburgh, German Research Centre for Geosciences - Helmholtz-Centre Potsdam (GFZ), Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of Bayreuth, European Synchrotron Radiation Facility (ESRF), Oak Ridge National Laboratory [Oak Ridge] (ORNL), UT-Battelle, LLC, Institut für Geowissenschaften [Frankfurt am Main], Goethe-Universität Frankfurt am Main, Deutsches Elektronen-Synchrotron [Hamburg] (DESY), University of Potsdam = Universität Potsdam, Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), LInguistique et DIdactique des Langues Étrangères et Maternelles (LIDILEM), Université Stendhal - Grenoble 3, Max-Planck-Institut für Chemie (MPIC), Max-Planck-Gesellschaft, and University of Potsdam
Subjects: Diffraction, diffraction, Analytical chemistry, 02 engineering and technology, 01 natural sciences, Catalysis, Diamond anvil cell, law.invention, alloys, law, high-pressure and -temperature chemistry, 0103 physical sciences, [CHIM]Chemical Sciences, Precession electron diffraction, Reactivity (chemistry), 010306 general physics, Chemistry, Organic Chemistry, General Chemistry, 021001 nanoscience & nanotechnology, materials synthesis, Synchrotron, reactivity, solid solutions, Electron microscope, 0210 nano-technology, Ambient pressure, Solid solution
Abstract: International audience; Multi-anvil and laser-heated diamond anvil methods areused to subject Ge and Si mixtures to pressures and temperaturesof between 12 and 17 GPa and 1500 – 1800 K, respectively.Synchrotron angle dispersive X-ray diffraction, precession electrondiffraction and chemical analysis using electron microscopy, revealrecovery at ambient pressure of hexagonal Ge-Si solid solutions(P63/mmc). Taken together, the multi-anvil and diamond anvil resultsreveal that hexagonal solid solutions can be prepared for all Ge-Sicompositions. This hexagonal class of solid solutions constitutes asignificant expansion of the bulk Ge-Si solid solution family, and is ofactive interest for optoelectronic applications.
Published: 2021

5. Effect of the process atmosphere on glass foam synthesis: A high-temperature environmental scanning electron microscopy (HT-ESEM) study

Author: Sébastien Genty, J. Lautru, Renaud Podor, Ronan Lebullenger, François O. Méar, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Etude de la Matière en Mode Environnemental (L2ME), Institut de Chimie Séparative de Marcoule (ICSM - UMR 5257), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), RecyverProject (Univ. Rennes, Univ. Lille, Ecosystemes, 2013-2015), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Sintering, chemistry.chemical_element, HT-ESEM, 02 engineering and technology, 01 natural sciences, Oxygen, Atmosphere, Glass-foam, Viscosity, 0103 physical sciences, Materials Chemistry, [CHIM]Chemical Sciences, Tube (fluid conveyance), Graphite, Environmental scanning electron microscope, 010302 applied physics, Process Chemistry and Technology, Reducing atmosphere, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Chemical engineering, chemistry, 13. Climate action, Water steam, Ceramics and Composites, CRT glass, MnO2, 0210 nano-technology
Abstract: International audience; The effect of the process atmosphere composition on the foam formation of cathode-ray tube (CRT) glass containing graphite and MnO2 was studied using in situ environmental scanning electron microscopy at high temperature (HT-ESEM). When compared to He+4% H2, O2 or air, water steam facilitates glass grain sintering. This is probably due to the formation of hydroxyl groups at the glass grain surface that locally decrease the glass viscosity. We have shown that increasing the steam pressure from 50 Pa to 750 Pa decreases both sintering and foaming onset temperatures by approximately 100 degrees C, favouring the formation of closed pores in viscous glass. At high temperature, the presence of water steam or oxygen promotes foam formation, while the presence of a reducing atmosphere (He+4%H2) limits glass melt foaming. A synergetic effect of O2 and H2O on the onset temperature of glass sintering and foam formation is evidenced.
Published: 2021

6. Electrochemical and electronic detection of biomarkers in serum: a systematic comparison using aptamer-functionalized surfaces

Author: Henri Happy, Wolfgang Knoll, Patrik Aspermair, Vladyslav Mishyn, Yann R. Leroux, Teresa Rodrigues, Rabah Boukherroub, Laura Butruille, Sabine Szunerits, David Montaigne, Eloise Woitrain, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Austrian Institute of Technology [Vienna] (AIT), Institut des Sciences Chimiques de Rennes (ISCR), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Récepteurs Nucléaires, Maladies Métaboliques et Cardiovasculaires (RNMCD - U1011), Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Carbon - IEMN (CARBON - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Danube Private University [Krems, Autriche] (DPU), NanoBioInterfaces - IEMN (NBI - IEMN), Financial support from the Centre National de la Recherche Scientifique (CNRS), the University of Lille, the Hauts-de-France region and the CPER 'Photonics for Society' is gratefully acknowledged. Financial support came further from the FFG, Austria, within the Comet program., IEMN, Collection, Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), and Récepteurs Nucléaires, Maladies Métaboliques et Cardiovasculaires - U1011 (RNMCD)
Subjects: Analyte, Aptamer, [SPI] Engineering Sciences [physics], 02 engineering and technology, Biosensing Techniques, 010402 general chemistry, 01 natural sciences, Biochemistry, Graphene-based field-effect transistor, Analytical Chemistry, [SPI]Engineering Sciences [physics], Limit of Detection, Troponin I, Humans, Detection limit, Chromatography, Chemistry, Differential pulse voltammetry, Electrochemical Techniques, Aptamers, Nucleotide, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Electrochemical gas sensor, Dissociation constant, Ionic strength, cTnI, 0210 nano-technology, Biomarkers
Abstract: International audience; Sensitive and selective detection of biomarkers in serum in a short time has a significant impact on health. The enormous clinical importance of developing reliable methods and devices for testing serum levels of cardiac troponin I (cTnI), which are directly correlated to acute myocardial infarction (AMI), has spurred an unmatched race among researchers for the development of highly sensitive and cost-effective sensing formats to be able to differentiate patients with early onset of cardiac injury from healthy individuals with a mean cTnI level of 26 pg mL-1. Electronic- and electrochemical-based detection schemes allow for fast and quantitative detection not otherwise possible at the point of care. Such approaches rely largely on voltammetric and field-effect-based readouts. Here, we systematically investigate electric and electrochemical point-of-care sensors for the detection of cTnI in serum samples by using the same surface receptors, cTnI aptamer-functionalized CVD graphene-coated interdigated gold electrodes. The analytical performances of both sensors are comparable with a limit of detection (LoD) of 5.7 ± 0.6 pg mL-1(electrochemical) and 3.3 ± 1.2 pg mL-1 (electric). However, both sensors exhibit different equilibrium dissociation constant (KD) values between the aptamer-linked surface receptor and the cTnI analyte, being 160 pg mL-1 for the electrochemical and about three times lower for the electrical approach with KD = 51.4 pg mL-1. This difference is believed to be related to the use of a redox mediator in the electrochemical sensor for readout. The ability of the redox mediator to diffuse from the solution to the surface via the cTnI/aptamer interface is hindered, correlating to higher KD values. In contrast, the electric readout has the advantage of being label-free with a sensing limitation due to ionic strength effects, which can be limited using poly(ethylene) glycol surface ligands.
Published: 2022

7. Doping effect on nanoscopic and macroscopic electrical properties of Barium Zirconate Titanate thin films

Author: Rachel Desfeux, Anthony Ferri, A. Da Costa, Amina Tachafine, Didier Fasquelle, Abdelkader Outzourhit, Jean-Claude Carru, Unité de Dynamique et Structure des Matériaux Moléculaires (UDSMM), Université du Littoral Côte d'Opale (ULCO), UCCS Équipe Couches Minces & Nanomatériaux, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille-Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Faculté des Sciences Semlalia [Marrakech], Université Cadi Ayyad [Marrakech] (UCA), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: inorganic chemicals, Silicon, thin film, chemistry.chemical_element, Nanotechnology, 02 engineering and technology, 01 natural sciences, Analytical Chemistry, Atomic force microscopy, 0103 physical sciences, dielectric measurements, Barium zirconate, Thin film, Nanoscopic scale, Spectroscopy, 010302 applied physics, Doping, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Titanate, Piezoresponse force microscopy, chemistry, nanoscale investigations, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], barium zirconate Titanate, piezoresponse force microscopy, 0210 nano-technology
Abstract: International audience; Lead-free Barium Zirconate Titanate thin films synthesized by sol-gel process were deposited on platinized silicon substrates. Atomic and piezoresponse force microscopies analysis have revealed low values for the surface roughness and local piezoelectric loops, respectively. Nanoscopic piezoelectric and ferroelectric properties decrease with zirconium content increasing. Dielectric measurements were made up to 1 MHz at room temperature. The highest dielectric permittivity and tunability are obtained for 10% of zirconium. Dielectric loss tangent decreases with frequency, zirconium content and electric field increasing. Thin films with 20% of zirconium could be particularly interesting for electronic applications.
Published: 2021

8. Asymmetric micro-supercapacitors based on electrodeposited Ruo2 and sputtered VN films

Author: Christophe Lethien, Thierry Brousse, Kevin Robert, Bouchra Asbani, Pascal Roussel, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Réseau sur le stockage électrochimique de l'énergie (RS2E), Université de Nantes (UN)-Aix Marseille Université (AMU)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Université de Picardie Jules Verne (UPJV)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), Circuits Systèmes Applications des Micro-ondes - IEMN (CSAM - IEMN ), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut des Matériaux Jean Rouxel (IMN), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), This research benefitted from the financial support of the ANR within the DENSSCAPIO project (ANR-17-CE05–0015–02). The authors would also like to thank the ANR STORE-EX and the RS2E for their financial support. The RENATECH network receives our utmost gratitude. Chevreul Institute (CNRS FR 2638), Ministère de l’Enseignement Supérieur et de la Recherche, Région Hauts de France and FEDER are acknowledged for supporting and funding XRD facilities., RS2E, Renatech Network, CMNF, ANR-17-CE05-0015,DENSSCAPIO,Supercondensateurs nanostructurés tout-solides pour stockage d'énergie plus dense et plus sûr(2017), ANR-10-LABX-0076,STORE-EX,Laboratory of excellency for electrochemical energy storage(2010), Université de Picardie Jules Verne (UPJV)-Institut de Chimie du CNRS (INC)-Aix Marseille Université (AMU)-Université de Pau et des Pays de l'Adour (UPPA)-Université de Nantes (UN)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Ecole Polytechnique de l'Université de Nantes (EPUN), Université de Nantes (UN)-Université de Nantes (UN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), CNRS, Centrale Lille, ENSCL, ISEN, Institut Catholique Lille, Univ. Artois, Univ. Valenciennes, Université de Lille, Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520, and Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181
Subjects: Materials science, Vanadium nitride, Energy Engineering and Power Technology, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, 7. Clean energy, Capacitance, Ruthenium oxide, vanadium nitride, chemistry.chemical_compound, asymmetric micro-supercapacitors, Sputtering, General Materials Science, Thin film, Electrochemical potential, Power density, Supercapacitor, Renewable Energy, Sustainability and the Environment, business.industry, [SPI.NRJ]Engineering Sciences [physics]/Electric power, hydrous ruthenium oxide, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, thin films, chemistry, electrodeposition, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Optoelectronics, sputtering, 0210 nano-technology, business
Abstract: International audience; Research on micro-supercapacitors remains one of the most important activities in the area of electrochemical energy storage for powering smart and miniaturized electronic devices. Here we design an asymmetric micro-supercapacitor (A-MSC) combining sputtered vanadium nitride film (VN) and electrodeposited hydrous ruthenium oxide (hRuO2) film. Taking advantage of their complementary electrochemical potential windows in 1 M KOH electrolyte, the A-MSC achieves a cell voltage up to 1.15 V, associated to high specific capacitance values for the device (≈ 100 mF cm−2). The energy density of this asymmetric VN / hRuO2 micro-supercapacitor reaches 20 µWh cm−2 at a power density of 3 mW cm−2. Taking benefit from the asymmetric configuration, a 5-fold enhancement factor in energy density is demonstrated for the VN / hRuO2 asymmetric micro-supercapacitor as compared to symmetric VN / VN and hRuO2 / hRuO2 microdevices.
Published: 2021

9. Atomic Layer Deposition of a Nanometer-Thick Li3PO4 Protective Layer on LiNi0.5Mn1.5O4 Films: Dream or Reality for Long-Term Cycling?

Author: Pascal Roussel, Richard Retoux, Christophe Lethien, José Avila, Maxime Hallot, Clement Leviel, Maria C. Asensio, Oleg I. Lebedev, Borja Caja-Munoz, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Réseau sur le stockage électrochimique de l'énergie (RS2E), Université de Nantes (UN)-Aix Marseille Université (AMU)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Collège de France (CdF (institution))-Université de Picardie Jules Verne (UPJV)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Université Grenoble Alpes (UGA), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de cristallographie et sciences des matériaux (CRISMAT), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Universitat de València (UV), Circuits Systèmes Applications des Micro-ondes - IEMN (CSAM - IEMN ), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), This research was financially supported by the ANR within the CASSIOPES project (ANR-17-CE09-0016-01). The authors also thank the French network on electrochemical energy storage (RS2E) and the Store-Ex Labex for the support. The French RENATECH network is greatly acknowledged for the use of microfabrication facilities. The authors are grateful to the French METSA network (FR3507) for the financial support of the transmission electron microscope experiment. Chevreul Institute (FR 2638), Ministère de l’Enseignement Supérieur et de la Recherche, Région Hauts de France and FEDER are acknowledged for supporting and funding XRD facilities., Renatech Network, RS2E, METSA, CMNF, ANR-17-CE09-0016,CASSIOPES,Caractérisations AvancéeS in SItu / OPerando de micro-batteriES 3D tout solide à ions lithium développées en technologie couche mince ALD(2017), ANR-10-LABX-0076,STORE-EX,Laboratory of excellency for electrochemical energy storage(2010), Boston College (BC), ISIS Neutron and Muon Source (ISIS), STFC Rutherford Appleton Laboratory (RAL), and Science and Technology Facilities Council (STFC)-Science and Technology Facilities Council (STFC)
Subjects: Materials science, LiNi0.5Mn1.5O4, 02 engineering and technology, Electrolyte, 010402 general chemistry, 01 natural sciences, NEXAFS, [SPI]Engineering Sciences [physics], Atomic layer deposition, X-ray photoelectron spectroscopy, Sputtering, XPS, [CHIM]Chemical Sciences, General Materials Science, Thin film, Composite material, [PHYS]Physics [physics], Surface protective layer, 021001 nanoscience & nanotechnology, Surface chemistry, 0104 chemical sciences, Electrode, Nanometre, 0210 nano-technology, Layer (electronics)
Abstract: International audience; LiNi0.5Mn1.5O4 (LNMO) is a promising 5V-class electrode for Li-ion batteries but suffers from manganese dissolution and electrolyte decomposition owing to the high working potential. An attractive solution to stabilize the surface chemistry consists in mastering the interface between the LNMO electrode and the liquid electrolyte with a surface protective layer made from the powerful surface deposition method. Here, we show that a 7400 nm thick sputtered LNMO film coated with a nanometer-thick lithium-ion-conductive Li3PO4 layer was deposited by the atomic layer deposition method. We demonstrate that this “material model system” can deliver a remarkable surface capacity (∼0.4 mAh cm–2 at 1C) and exhibits improved cycling lifetime (×650%) compared to the nonprotected electrode. Nevertheless, we observe that mechanical failure occurs within the LNMO and Li3PO4 films when long-term cycling is performed. This in-depth study gives new insights regarding the mechanical degradation of LNMO electrodes upon charge/discharge cycling and reveals for the first time that the surface protective layer made from the ALD method is not sufficient for long-term stability applications.
Published: 2021

10. Multi-layer MoS2-Based Plasmonic Gold Nanowires at Near-Perfect Absorption for Energy Harvesting

Author: Zakariae Oumekloul, Shuwen Zeng, A. Mir, Abdellatif Akjouj, Younes Achaoui, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Physique - IEMN (PHYSIQUE - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and A. Akjouj gratefully acknowledges the hospitality of the department of Physics, Faculty of Science, University of Moulay Ismail of Meknes. This work was partially supported by the program FINCOME 'Centre National pour la Recherche Scientifque et Technique, Morocco'.
Subjects: Biophysics, Nanowire, Metamaterial, Gold nanowires, 02 engineering and technology, Localized surface plasmon resonance, 2D materials, 021001 nanoscience & nanotechnology, 01 natural sciences, Biochemistry, Engineering physics, Transition metal dichalcogenides, law.invention, 010309 optics, [SPI]Engineering Sciences [physics], Material selection, law, Smart city, 0103 physical sciences, Solar cell, 0210 nano-technology, Absorption (electromagnetic radiation), Energy harvesting, Plasmon, Biotechnology
Abstract: International audience; One of the biggest challenges in relation to the modernistic vision of smart city technology is to provide confdent autonomous energy, notably in terms of power storage. If you want to change an existing lifestyle, you cannot ignore the basic concepts collected from basic physics. The subject of Metamaterials stands for an important research area that can be explored and used to come up with unparalleled ideas about the properties and functions that are completely absent from natural materials. In contrast to other bold technologies, combining a simple layered surface with appropriate material selection makes it possible to pattern and manufacture new types of solar cells that work in a wide frequency range. In this article, we propose a simple method to boost the coupling interaction between metallic gold nanowires with multiple MoS2 layers. The innovation of this work is that the thickness layer changes have great stability in the infuence of the absorption performance and electric feld distribution in the visible light and near-infrared spectra. Therefore, this new design can be seen as very important in many felds from sensing to solar cell applications
Published: 2021

11. Clustering and Hierarchical Organization of 3D Printed Poly(propylene fumarate)-block-PEG-block-poly(propylene fumarate) ABA Triblock Copolymer Hydrogels

Author: Rodger A. Dilla, Gaëlle Le Fer, Matthew L. Becker, Jaelynne King, Zeyu Wang, Steven S. C. Chuang, Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Subjects: 3d printed, Materials science, Polymers and Plastics, macromolecular substances, 02 engineering and technology, mechanical properties, 010402 general chemistry, degradable, complex mixtures, 01 natural sciences, Inorganic Chemistry, Poly(propylene fumarate), Block (telecommunications), PEG ratio, Materials Chemistry, Copolymer, [CHIM]Chemical Sciences, ComputingMilieux_MISCELLANEOUS, hydrogels, [PHYS]Physics [physics], Organic Chemistry, technology, industry, and agriculture, 3D printing, 021001 nanoscience & nanotechnology, nanoscale ordering, 0104 chemical sciences, 3. Good health, Chemical engineering, Self-healing hydrogels, amphiphilic copolymers, 0210 nano-technology
Abstract: International audience; Hydrogels are deployed widely in all areas of regenerative medicine, including bioprinting. The transport and mechanical properties exhibited by hydrogel assemblies are controlled by their organization and hierarchical assembly. This paper points out the role of the nanoscale size and ordering of hydrophobic cross-linked domains on the mechanical and degradation properties of three-dimensional (3D) printed amphiphilic hydrogels. A series of six poly(propylene fumarate)-block-poly(ethylene glycol)-block-poly(propylene fumarate) (PPF-b-PEG-b-PPF) ABA triblock copolymers were synthesized by varying both the water-soluble PEG block and the cross-linkable hydrophobic terminal PPF block lengths. Self-assembled hydrogels were formed by dissolving these amphiphilic PPF-b-PEG-b-PPF copolymers in water and covalently cross-linking the PPF units via digital light processing (DLP) additive manufacturing. Differential scanning calorimetry (DSC), in situ diffuse reflectance infrared spectroscopy (DRIFTS-IR) measurements, small-angle neutron scattering (SANS), and compressive measurements highlight how structural properties correlate with mechanical properties within this hydrogel system. Finally, swelling and in vitro degradation tests showed the influence of the nanoscale ordering on the degradation timescale.
Published: 2021

12. Van Hove Singularities and Trap States in Two-Dimensional CdSe Nanoplatelets

Author: Nathali Alexandra Franchina Vergel, Christophe Delerue, Iwan Moreels, Dominique Deresmes, Bruno Grandidier, Y. Lambert, Nemanja Peric, Ali Hossain Khan, Shalini Singh, Maxime Berthe, Zeger Hens, Louis Biadala, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Physique - IEMN (PHYSIQUE - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Universiteit Gent = Ghent University [Belgium] (UGENT), Plateforme de Caractérisation Multi-Physiques - IEMN (PCMP - IEMN), This study was financially supported by the European Community’s H2020 Program (Grant No. PITN-GA-2016-722176, 'Indeed' Project), the EQUIPEX program Excelsior (Grant No. ANR-11-EQPX-0015), the RENATECH network, the Agence National de la Recherche (Grant No. ANR-19-CE09-0022, 'TROPICAL' Project), and I-SITE ('PRIVET' project). This project has also received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme (grant agreement No. 714876 PHOCONA). We also acknowledge the TEM facility of the Nematology Research Unit, member of the UGent TEM-Expertise Centre (life sciences)., Renatech Network, PCMP PCP, ANR-11-EQPX-0015,Excelsior,Centre expérimental pour l'étude des propriétés des nanodispositifs dans un large spectre du DC au moyen Infra-rouge.(2011), European Project: 722176,H2020, H2020-MSCA-ITN-2016,INDEED(2017), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), and Universiteit Gent = Ghent University (UGENT)
Subjects: Nanostructure, Flatness (systems theory), Scanning tunneling spectroscopy, Bioengineering, 02 engineering and technology, dimensionality, CdSe, quantum confinement, Tight binding, nanocrystals, General Materials Science, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Quantum well, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Condensed matter physics, business.industry, Mechanical Engineering, nanoplatelets, General Chemistry, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Semiconductor, Quantum dot, Density of states, 0210 nano-technology, business
Abstract: International audience; Semiconductor nanoplatelets, which offer a compelling combination of the flatness of two-dimensional semiconductors and the inherent richness brought about by colloidal nanostructure synthesis, form an ideal and general testbed to investigate fundamental physical effects related to the dimensionality of semiconductors. With low temperature scanning tunnelling spectroscopy and tight binding calculations, we investigate the conduction band density of states of individual CdSe nanoplatelets. We find an occurrence of peaks instead of the typical steplike function associated with a quantum well, that rule out a free in-plane electron motion, in agreement with the theoretical density of states. This finding, along with the detection of deep trap states located on the edge facets, which also restrict the electron motion, provides a detailed picture of the actual lateral confinement in quantum wells with finite length and width.
Published: 2021

13. SERS characterization of aggregated and isolated bacteria deposited on silver-based substrates

Author: Lea Rosselle, Eric Larquet, Anne Chantal Gouget-Laemmel, Simion Astilean, Cristina-Cassiana Andrei, Anne Moraillon, Sabine Szunerits, Monica Potara, François Ozanam, Endre Jakab, Nadia Skandrani, Rabah Boukherroub, Julie Bouckaert, Laboratoire de physique de la matière condensée, CNRS, École polytechnique,IP Paris, Palaiseau, France, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), NanoBioInterfaces - IEMN (NBI - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), European Project: 690836,H2020,H2020-MSCA-RISE-2015,PANG(2016), Laboratoire de Physique de la Matière Condensée (LPMC), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université de Lille, CNRS, Laboratoire de physique de la matière condensée [LPMC], Babes-Bolyai University [Cluj-Napoca] [UBB], Unité de Glycobiologie Structurale et Fonctionnelle (UGSF) - UMR 8576, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN], and Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520
Subjects: Surface-enhanced Raman scattering (SERS), Silver nanostructures, Escherichia coli, Staphylococcus aureus, Aggregated and single bacteria, Principal component analysis (PCA), Silver, Surface Properties, 02 engineering and technology, Spectrum Analysis, Raman, medicine.disease_cause, 01 natural sciences, Biochemistry, Pilus, Analytical Chemistry, Cell wall, symbols.namesake, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, medicine, Humans, Molecule, Escherichia coli Infections, biology, Chemistry, 010401 analytical chemistry, Substrate (chemistry), [CHIM.MATE]Chemical Sciences/Material chemistry, Staphylococcal Infections, 021001 nanoscience & nanotechnology, biology.organism_classification, 0104 chemical sciences, Biophysics, symbols, 0210 nano-technology, Raman spectroscopy, Bacteria, Raman scattering
Abstract: International audience; Surface-enhanced Raman scattering (SERS), based on the enhancement of the Raman signal of molecules positioned within a few nanometres from a structured metal surface, is ideally suited to provide bacterial-specific molecular fingerprints which can be used for analytical purposes. However, for some complex structures such as bacteria, the generation of reproducible SERS spectra is still a challenging task. Among the various factors influencing the SERS variability (such as the nature of SERS-active substrate, Raman parameters and bacterial specificity), we demonstrate in this study that the environment of Gram-positive and Gram-negative bacteria deposited on ultra-thin silver films also impacts the origin of the SERS spectra. In the case of densely packed bacteria, the obtained SERS signatures were either characteristic of the secretion of adenosine triphosphate for Staphylococcus aureus (S. aureus) or the cell wall and the pili/flagella for Escherichia coli (E. coli), allowing for an easy discrimination between the various strains. In the case of isolated bacteria, SERS mapping together with principal component analysis revealed some variabilities of the spectra as a function of the bacteria environment and the bactericidal effect of the silver. However, the variability does not preclude the SERS signatures of various E. coli strains to be discriminated.
Published: 2021

14. Thermal conductivity of benzothieno-benzothiophene derivatives at the nanoscale

Author: Claudio Melis, Vincent Lemaur, Alexandre Vercouter, Rémy Jouclas, Guillaume Schweicher, Yves Geerts, Stéphane Lenfant, Aleandro Antidormi, David Guerin, Magatte N. Gueye, Jérôme Cornil, Dominique Vuillaume, National Fund for Scientific Research (Belgium), Fonds de la Recherche Scientifique (Fédération Wallonie-Bruxelles), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), University of Mons [Belgium] (UMONS), Université libre de Bruxelles (ULB), Centrale de Micro Nano Fabrication - IEMN (CMNF - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Nanostructures, nanoComponents & Molecules - IEMN (NCM - IEMN), Catalan Institute of Nanoscience and Nanotechnology (ICN2), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC)-Barcelona Institute of Science and Technology (BIST), International Solvay Institutes for Physics and Chemistry [Brussels], Vrije Universiteit Brussel (VUB)-Université libre de Bruxelles (ULB), Dipartimento di Fisica, Universita di Cagliari (Dipartimento di Fisica, Universita di Cagliari), Universita degli Studi di Cagliari [Cagliari], PCMP PCP, Renatech Network, ANR-16-CE05-0029,Harvesters,Récuperer l'energie thermique de l'environnement à l'aide d'un générateur thermoélectrique polymère pour alimenter un capteur autonome(2016), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université libre de Bruxelles (ULB)-Vrije Universiteit Brussel (VUB), and Università degli Studi di Cagliari = University of Cagliari (UniCa)
Subjects: Scanning thermal microscopy, Yield (engineering), Materials science, Thermal resistance, Analytical chemistry, FOS: Physical sciences, 02 engineering and technology, organic thermoelectricity, 010402 general chemistry, 01 natural sciences, [SPI]Engineering Sciences [physics], chemistry.chemical_compound, Molecular dynamics, Thermal conductivity, Thermal conductance, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Benzothiophene derivatives, Chimie, General Materials Science, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], Anisotropy, Nanoscopic scale, [PHYS]Physics [physics], thermal conducHvity, Condensed Matter - Mesoscale and Nanoscale Physics, organic semiconductor, Physique, Approach to equilibrium, Benzothiophene, Crystalline directions, 021001 nanoscience & nanotechnology, scanning thermal microscopy (SThM), Thickness dependence, 0104 chemical sciences, Anisotropy factor, Molecular dynamics calculation, chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], approach to equilibrium molecular dynamics (AEMD), 0210 nano-technology
Abstract: We study by scanning thermal microscopy the nanoscale thermal conductance of films (40-400 nm thick) of [1]benzothieno[3,2-b][1]benzothiophene (BTBT) and 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT-C8). We demonstrate that the out-of-plane thermal conductivity is significant along the interlayer direction, larger for BTBT (0.63 ± 0.12 W m-1 K-1) compared to C8-BTBT-C8 (0.25 ± 0.13 W m-1 K-1). These results are supported by molecular dynamics calculations (approach to equilibrium molecular dynamics method) performed on the corresponding molecular crystals. The calculations point to significant thermal conductivity (3D-like) values along the 3 crystalline directions, with anisotropy factors between the crystalline directions below 1.8 for BTBT and below 2.8 for C8-BTBT-C8, in deep contrast with the charge transport properties featuring a two-dimensional character for these materials. In agreement with the experiments, the calculations yield larger values in BTBT compared to C8-BTBT-C8 (0.6-1.3 W m-1 K-1versus 0.3-0.7 W m-1 K-1, respectively). The weak thickness dependence of the nanoscale thermal resistance is in agreement with a simple analytical model. This journal is, M. G., D. G., S. L. and D. V. thank the ANR for financial support (ANR-16-CE05-0029). Y. G. is thankful to the Belgian National Fund for Scientific Research (FNRS) for financial support through research projects BTBT (# 2.4565.11), Phasetrans (# T.0058.14), Pi-Fast (# T.0072.18), 2D to 3D (# 30489208), and DIFFRA (# U.G001.19). Financial supports from the French Community of Belgian (ARC # 20061) is also acknowledged. G. S. acknowledges postdoctoral fellowship support from the FNRS. The work in the Laboratory for Chemistry of Novel Materials was supported by the Consortium des Équipements de Calcul Intensif (CÉCI), funded by the Fonds de la Recherche Scientifique de Belgique (F.R.S.-FNRS) under grant # 2.5020.11. J.C. and A.V. are FNRS research fellows.
Published: 2021

15. Acoustic Tamm states in slender tubes

Author: Madiha Amrani, Soufyane Khattou, E. H. El Boudouti, A. Mouadili, Bahram Djafari-Rouhani, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Physique - IEMN (PHYSIQUE - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Centre National pour la Recherche Scientifique et Technique, CNRST, Hammouti B.Eddaoudi M.Touzani R., Université catholique de Lille (UCL)-Université catholique de Lille (UCL), and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: Surface (mathematics), Physics, Comb-like structure, 02 engineering and technology, Acoustic wave, Type (model theory), 021001 nanoscience & nanotechnology, 01 natural sciences, Molecular physics, Crystal, Maxima and minima, [SPI]Engineering Sciences [physics], Transmission (telecommunications), Band gap, 0103 physical sciences, Transmission, Waveguide (acoustics), Tube (container), 010306 general physics, 0210 nano-technology, Acoustic Tamm states, Surface modes
Abstract: International audience; We present an analytical and numerical study of the possibility of existence of surface localized modes, the so-called Tamm states, in a one-dimensional (1D) comb-like phononic crystal (PnC). The structure is made out of periodic array of stubs of lengths d2grafted along a waveguide and separated from each other by a tube of length d1. We show the existence of surface modes for the semi-infinite structure. In particular, when one considers two complementary semi-infinite systems obtained by cutting the infinite one into two parts, we obtain one surface mode per gap induced by the surface of the two complementary systems. Furthermore, we demonstrate that these surface modes can be detected from the maxima and minima of the transmission spectrum, when the finite structure is grafted vertically along a homogeneous acoustic waveguide. That means that one can observe experimentally this type of modes for acoustic waves in slender tubes. These results may find many practical applications in noise control and highly sensitive PnC sensors. © 2021 Elsevier Ltd. All rights reserved.
Published: 2021

16. Influence of process variables on foaming ability of surfactants: Experimental study and dimensional analysis

Author: Alla Nesterenko, Elisabeth van-Hecke, Rémy Bois, Isabelle Pezron, Guillaume Delaplace, Océane Adriao, Transformation Intégrée de la Matière Renouvelable (TIMR), Université de Technologie de Compiègne (UTC), Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Subjects: Materials science, General Chemical Engineering, Flow (psychology), Mixing (process engineering), 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Reynolds number, Agitator, Physics::Fluid Dynamics, symbols.namesake, Surfactant, [SDV.IDA]Life Sciences [q-bio]/Food engineering, Mechanical stirring, Experimental work, Rotational speed, General Chemistry, Mechanics, 021001 nanoscience & nanotechnology, Dimensional analysis, 0104 chemical sciences, Process, Scientific method, symbols, 0210 nano-technology, Foaming, Dimensionless quantity
Abstract: International audience; By applying the dimensional analysis approach to a lab-scale stirred tank process, the influence of process parameters on the foamability of three model surfactants: SLES, Tween 20 and Brij L23 is investigated and modelled. For validation of process law, the theoretical approach is complemented with an experimental work varying process parameters such as agitator rotational speed rate (N), mixing time (tm) and bottom clearance (Cb). The foam rate of expansion of surfactant solutions is correlated with success to two dimensionless numbers: the Reynolds number and the mixing time number. Reynolds number is observed as mainly governing the amount of formed foam. A clear difference between the intermediate flow regime (Re < 105) and the turbulent one (Re > 105) is observed leading to a different process law for each regime. Master curves are finally drawn and can be used for helping to predict final foam volumes in the studied experimental domain according to both dimensionless numbers.
Published: 2021

17. Pressure effects on morphology of isotropic char layer, shrinkage, cracking and reduced heat transfer of wooden material

Author: Kaiyuan Li, Serge Bourbigot, Yanyan Zou, Jie Ji, Xianfeng Chen, Université de Lille, CNRS, INRA, ENSCL, Wuhan University [China], BRANZ [New Zealand], Unité Matériaux et Transformations - UMR 8207 [UMET], University of Science and Technology of China [Hefei] [USTC], Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), University of Science and Technology of China [Hefei] (USTC), European Project: 670747,H2020,ERC-2014-ADG,FireBar-Concept(2016), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Subjects: Materials science, 020209 energy, General Chemical Engineering, 02 engineering and technology, Char, Thermal conductivity, Heat transfer, Pressure, 0202 electrical engineering, electronic engineering, information engineering, Physical and Theoretical Chemistry, Composite material, Shrinkage, Wood, Pyrolysis, Mechanical Engineering, Internal pressure, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Cracking, [CHIM.POLY]Chemical Sciences/Polymers, 0210 nano-technology, Ambient pressure
Abstract: International audience; Using a compartment with adjustable oxygen concentration and internal pressure, the shrinkage and cracking of isotropic char layer during pyrolysis were studied by pyrolyzing the medium density fibreboard (MDF) in inert atmosphere with different ambient pressures. The experimental results have shown that the ambient pressure has insignificant effect on shrinkage although some trends have been identified. Therefore, the reduction of tensile strength of material dominates the char cracking under low pressures, leading to noticeableincrease in the number of char fissures. The char shrinkage could expose the raw material beneath the char layer and enhance the radiative heat transfer at the sample surface (by fissure width instead of number), which is modeled using a modified thermal conductivity as the typical simplification. It is found that the mass loss rate at the early pyrolysis stage increases up to 20% with increasing width of char fissures. However, the external radiation can only affect a limited depth in the near surface zone which is found less than 3 mm in the current experiments. The thermal conductivity under near regular pressure could be over 2 times higher than its value under low pressure (30 kPa) and with which the differences in the first peaks of mass loss rate under different pressures can be well predicted.
Published: 2021

18. A high dimensional oxysulfide built from large iron-based clusters with partial charge-ordering

Author: Angel M. Arevalo-Lopez, Houria Kabbour, Batoul Almoussawi, Pardis Simon, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: Spin glass, Materials science, Structural type, Metals and Alloys, 02 engineering and technology, General Chemistry, [CHIM.INOR]Chemical Sciences/Inorganic chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Crystallography, Partial charge, Octahedron, Iron based, [CHIM.CRIS]Chemical Sciences/Cristallography, Materials Chemistry, Ceramics and Composites, Tetrahedron, 0210 nano-technology
Abstract: International audience; Herein we report the original Ba10Fe7.75Zn5.25S18Si3O12 oxysulfide which crystallizes in a new structural type. Contrary to the usual oxychalcogenides, it crystallizes with a non-centrosymmetric 3D spatial network structure built from large magnetic clusters consisting of twelve (Fe2+/3+/Zn)S3O tetrahedra decorating a central Fe2+S6 octahedron and exhibiting a spin glass state
Published: 2021

19. Engineering a Robust Flat Band in III–V Semiconductor Heterostructures

Author: Xavier Wallart, Daniel Vanmaekelbergh, Gilles Patriarche, David Troadec, Guillaume Fleury, Bruno Grandidier, Christophe Delerue, Nathali Alexandra Franchina Vergel, Maxime Berthe, Ludovic Desplanque, C. Coinon, Yannick Lambert, Tao Xu, François Vaurette, Davide Sciacca, Dmitri A. Yarekha, L. Christiaan Post, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Debye Institute for Nanomaterials Science, Utrecht University [Utrecht], Laboratoire de Chimie des Polymères Organiques (LCPO), Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Team 4 LCPO : Polymer Materials for Electronic, Energy, Information and Communication Technologies, Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Bordeaux (UB)-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Nanosciences et de Nanotechnologies (C2N), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Sino-European School of Technology, University of Shanghai [Shanghai], Physique - IEMN (PHYSIQUE - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Centrale de Micro Nano Fabrication - IEMN (CMNF - IEMN), EPItaxie et PHYsique des hétérostructures - IEMN (EPIPHY - IEMN), Dutch Research Council (NWO Chemistry - Toppunt 'Superficial superstructures'), Natural Science Foundation of Shanghai (19ZR1419500), Renatech Network, PCMP PCP, ANR-16-CE24-0007,Dirac-III-V,Super-réseau d'antipoints de Dirac pour les électrons dans les semiconducteurs III-V(2016), ANR-11-EQPX-0015,Excelsior,Centre expérimental pour l'étude des propriétés des nanodispositifs dans un large spectre du DC au moyen Infra-rouge.(2011), ANR-17-CE09-0021,GERMANENE,Croissance de germanene sur substrats à bande interdite(2017), European Project: FIRST STEP, Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Ecole Nationale Supérieure de Chimie, de Biologie et de Physique (ENSCBP)-Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC), Physique-IEMN (PHYSIQUE-IEMN), and Centrale de Micro Nano Fabrication - IEMN (CMNF-IEMN)
Subjects: Materials science, tight binding calculations, quantum well, flat band, Scanning tunneling spectroscopy, band engineering, Bioengineering, 02 engineering and technology, Electron, Lattice constant, General Materials Science, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], Electronic band structure, Lithography, ComputingMilieux_MISCELLANEOUS, Quantum well, block copolymer lithography, business.industry, Mechanical Engineering, Heterojunction, disorder, General Chemistry, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Two-dimensional lattice, Quantum dot, scanning tunneling spectroscopy, Optoelectronics, III−V semiconductor, 0210 nano-technology, business
Abstract: Electron states in semiconductor materials can be modified by quantum confinement. Adding to semiconductor heterostructures the concept of lateral geometry offers the possibility to further tailor the electronic band structure with the creation of unique flat bands. Using block copolymer lithography, we describe the design, fabrication, and characterization of multiorbital bands in a honeycomb In0.53Ga0.47As/InP heterostructure quantum well with a lattice constant of 21 nm. Thanks to an optimized surface quality, scanning tunnelling spectroscopy reveals the existence of a strong resonance localized between the lattice sites, signature of a p-orbital flat band. Together with theoretical computations, the impact of the nanopatterning imperfections on the band structure is examined. We show that the flat band is protected against the lateral and vertical disorder, making this industry-standard system particularly attractive for the study of exotic phases of matter.
Published: 2020

20. Fabrication and Optimization of High Frequency ZnO Transducers for Both Longitudinal and Shear Emission: Application of Viscosity Measurement using Ultrasound

Author: Vincent Thomy, Bertrand Nongaillard, Malika Toubal, Pierre Campistron, Souad Harmand, Julien Carlier, Ibrahim Zaaroura, Abbas Ramez Salhab, Hatem Dahmani, Marc Neyens, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Matériaux et Acoustiques pour MIcro et NAno systèmes intégrés - IEMN (MAMINA - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire d'Automatique, de Mécanique et d'Informatique industrielles et Humaines - UMR 8201 (LAMIH), Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), STMicroelectronics [Crolles] (ST-CROLLES), Bio-Micro-Electro-Mechanical Systems - IEMN (BIOMEMS - IEMN), This work was partially supported by the French Renatech network. A part of the cost has also been supported by STMicroelectronics and Hauts-de-France region., Renatech Network, Laboratoire commun STMicroelectronics-IEMN T3, Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)
Subjects: Materials science, Fabrication, Physics and Astronomy (miscellaneous), Shear and Longitudinal waves, 02 engineering and technology, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, Viscosity measurement, [SPI]Engineering Sciences [physics], Highfrequency, Management of Technology and Innovation, 0103 physical sciences, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Composite material, 010301 acoustics, Engineering (miscellaneous), [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], ZnO Transducer, business.industry, Ultrasound, 021001 nanoscience & nanotechnology, C-axis inclined ZnO, Matching network, Shear (sheet metal), Transducer, Volume and Shear viscosities, 0210 nano-technology, business
Abstract: International audience; This paper covers the study of high-frequency (~ 1 GHz) ZnO piezoelectric transducer integrated on a silicon substrate able to generate both compressional and shear acoustic waves. First, to promote the longitudinal mode, an electrical matching of the transducer in this high-frequency range is effectuated. Second, to promote shear waves, new deposition conditions were applied, giving thin zinc oxide films of inclined c-axis. The RF microprobe was used to validate the transducer design and to conduct the viscosity measurements. Thus, the shear and the volume viscosity of a water droplet were measured.
Published: 2020

21. Enhancement of photocatalytic properties of nanosized La2Ti2O7 synthesized by glycine-assisted sol-gel route

Author: Sébastien Leroy, Jean-François Blach, Agnieszka Kopia, Sebastian Lech, Łukasz Cieniek, Nicolas Kania, Sébastien Saitzek, UCCS Équipe Couches Minces & Nanomatériaux, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille-Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, AGH-University of Science and Technology, al. A. Mickiewicza 30, 30-059 Krakow, Poland, Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: General Chemical Engineering, General Physics and Astronomy, [CHIM]Chemical Sciences, 02 engineering and technology, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, 010402 general chemistry, 021001 nanoscience & nanotechnology, 0210 nano-technology, 01 natural sciences, Sol-gel Layered-perovskite Photodegradation Sonophotocatalysis, 0104 chemical sciences
Abstract: International audience; Nanosized lanthanum titanate (La2Ti2O7) have been synthetized by a new glycine-assisted sol gel route in order to improve the photocatalytic properties. The effect of calcination temperature on crystallites size and their photocatalytic efficiency has been investigated, showing a best efficiency for a calcination temperature of 1000 °C. Thus, the apparent rate constant of degradation of rhodamine B is greatly improved by a factor of 1.86 compared to commercial P25 TiO2 Degussa® and by a factor of 6.42 compared to a sol–gel synthesis without glycine.In order to study the efficiency of the photocatalyst on industrial water discharges, the photodegradation of phenol has also been investigated, showing the effectiveness of the photocatalyst with an apparent rate constant of 5.49 × 10−3 min−1. The photocatalyst mass loading, the luminous flux received and the pH have been also investigated. The effect of different type of scavengers shows the importance of superoxide and hole in the photodegradation mechanisms. Finally, the coupling of ultrasound and light excitation was carried out in order to achieve a sonophotocatalysis effect. The apparent rate constant corresponding to the photodegradation of phenol increases slightly. Nevertheless, we have been able to observe that this is more important as the volume of the photoreactor is low.
Published: 2022

22. Closed loop control of vibration field transient: Application to wave focusing

Author: Anis Kaci, Christophe Giraud-Audine, Frédéric Giraud, Betty Lemaire-Semail, Michel Amberg, Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 (L2EP), Centrale Lille-Haute Etude d'Ingénieurs-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Laboratoire d'Électrotechnique et d'Électronique de Puissance (L2EP) - ULR 2697, and Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 [L2EP]
Subjects: Modal decomposition, 0209 industrial biotechnology, Field (physics), Phase (waves), Aerospace Engineering, 02 engineering and technology, Linear Quadratic Regulator (LQR), Modulated–demodulated control (vector control), Multimodal vibration control, Focusing, Modal filter, Piezoelectric transducer, [SPI]Engineering Sciences [physics], 020901 industrial engineering & automation, Control theory, Demodulation, Civil and Structural Engineering, Physics, Mechanical Engineering, 021001 nanoscience & nanotechnology, Computer Science Applications, Vibration, Amplitude, Control and Systems Engineering, Modulation, Signal Processing, Vector field, Transient (oscillation), 0210 nano-technology
Abstract: Dans cet article, plusieurs modes sont contrôlés simultanément en phase et en amplitude sur un dispositif à retour haptique. Pour cela, un contrôle par modulation/démodulation combiné à du filtrage spatial/fréquentiel est développé. Il est ensuite appliqué pour produire un champ de vitesse prédéfini à la fois dans l’espace et dans le temps sur une plaque. Les résultats expérimentaux montrent un bon accord avec la théorie. In this article, several modes are controlled simultaneously both in phase and amplitude on an haptic display. To achieve this, modulation/demodulation control combined with mixed spatial/frequency filters is developed. It is then applied to produce a predefined velocity field both in space and time on a plate. The experimental results show good agreement with theory. 167
Published: 2022

23. Experimental characterization of three-dimensional Graphene’s thermoacoustic response and its theoretical modelling

Author: R. Lardat, Philippe Pernod, Edwin Hang Tong Teo, Dunlin Tan, Philippe Coquet, Olivier Bou-Matar, Zhi Lin Ngoh, Stefano Giordano, Pierre Guiraud, CNRS International - NTU - Thales Research Alliance (CINTRA), THALES [France]-Nanyang Technological University [Singapour]-Centre National de la Recherche Scientifique (CNRS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Thales Underwater Systems (TUS), THALES [France], This study is supported in part by the Economic Development Board of Singapore under the Industrial Postgraduate Program (EDB-IPP) with Thales Solutions Asia Pte Ltd and Temasek Laboratories@Nanyang Technological University seed funding. It is also supported by the French DGA (Direction Générale de l'Armement) under the Conventions Industrielles de Formation par la REcherche Program (CIFRE) with Thales Underwater Systems. This study is developed in collaboration with CINTRA, UMI 3288 CNRS/NTU/THALES (Singapore)., CNRS International NTU THALES Research Alliance (UMI CINTRA), THALES-Nanyang Technological University [Singapour]-Centre National de la Recherche Scientifique (CNRS), Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), THALES, School of Electrical and Electronic Engineering, Thales Solutions Asia Pte Ltd, Thales Underwater Systems, and Temasek Laboratories
Subjects: Materials science, theoretical modelling, Scanning electron microscope, thermoacoustics, chemistry.chemical_element, loudspeaker, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, chemical vapor deposition, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, symbols.namesake, law, General Materials Science, three-dimensional graphene (3D-C), [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Graphene, business.industry, Thermoacoustics, Three-dimensional Graphene, General Chemistry, 021001 nanoscience & nanotechnology, Compression (physics), Microstructure, 0104 chemical sciences, Characterization (materials science), chemistry, symbols, Optoelectronics, Electrical and electronic engineering::Nanoelectronics [Engineering], 0210 nano-technology, Raman spectroscopy, business, Carbon
Abstract: In the past decade, a lot of research has been conducted on the potential of carbon nanostructured materials to emit sound via thermoacoustics through both simulations and experiments. However, experimental validation of simulations for three-dimensional graphene (3D-C), which has a complicated 3D structure, has yet to be achieved. In this paper, 3D-C is synthesized via thermal chemical vapor deposition and its microstructure and quality tested using Scanning Electron Microscopy and Raman spectroscopy respectively. Then, a two temperature model is used to predict the effects of numerous parameters: frequency, input power, sample size, connection area, connection path, pores per inch, thickness, compression as well as the addition of a backing on the acoustic performance and temperature of the sample. The experimental results presented in this paper validate the predictions of the adopted two temperature model. The efficiency of 3D-C is then compared with results presented in other studies to understand how the presented 3D-C fared against ones from the literature as well as other carbon nanostructured materials. Accepted version This study is supported in part by the Economic Development Board of Singapore under the Industrial Postgraduate Program (EDB-IPP) with Thales Solutions Asia Pte Ltd and Temasek Laboratories@Nanyang Technological University seed funding. It is also supported by the French DGA (Direction Générale de l'Armement) under the Conventions Industrielles de Formation par la REcherche Program (CIFRE) with Thales Underwater Systems. This study is developed in collaboration with CINTRA, UMI 3288 CNRS/NTU/THALES (Singapore).
Published: 2020

24. Combinatıon of a Box-Behnken design technique with response surface methodology for optimization of the photocatalytic mineralization of C.I. Basic Red 46 dye from aqueous solution

Author: Abdelkrim Bouzaza, Mohammed Kheireddine Bouchareb, Yassine Kadmi, Mohammed Berkani, Mohammed Bouhelassa, Laboratoire Biotechnologies, Ecole Nationale Supérieure de Biotechnologie, Ville Universitaire Ali Mendjeli, BP E66 25100, Constantine, Algeria, Laboratoire Avancé de Spectroscopie pour les Intéractions la Réactivité et l'Environnement - UMR 8516 (LASIRE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Université d'Artois (UA), Université de Constantine, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Ali Mendjeli University City = Ville Universitaire Ali Mendjeli, Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille Institut (CLIL), Université Salah Boubnider Constantine 3, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Université de Rennes 1 (UR1), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Optimization, Mineralization, General Chemical Engineering, 02 engineering and technology, Wastewater, 010402 general chemistry, 01 natural sciences, lcsh:Chemistry, Response surface methodology, Ultraviolet light, [CHIM]Chemical Sciences, Photocatalysis, Photodegradation, Aqueous solution, Chemistry, General Chemistry, Mineralization (soil science), 021001 nanoscience & nanotechnology, Box–Behnken design, 0104 chemical sciences, Volumetric flow rate, lcsh:QD1-999, Chemical engineering, [SDE]Environmental Sciences, 0210 nano-technology, Azo dye
Abstract: International audience; The photodegradation of an industrial azo dye C.I Basic Red 46 was examined in a fixed-bed photoreactor using UV-lamps simulated to the solar irradiation. In our photodecolorization study, the UV/TiO2 process was optimized using the Box-Behnken approach to evaluate the synergistic effects of three independent parameters (initial concentration of the dye, flow rate, and UV intensity) on mineralization effectiveness. The response surface methodology was in good promise with the prediction model (coefficients of determination of decolorization and mineralization were R-Dec(2) = 0.997 and R-TOC(2) = 0.994, respectively). The effects of the factors could be estimated from a second-order polynomial equation and student's t-test. The optimal parameters of decolorization and mineralization were as follows: initial concentration of colorant 25 mg L-1, rate of fluid flow 0.3 L min(-1), and ultraviolet light intensity 38.1 W m(-2). The decolorization and mineralization removal efficiency under these optimal conditions were 100% and 57.63% respectively. These results indicate that optimization using response surface methodology, based on the Box-Behnken approach, is an excellent tool for determining the optimal conditions, and the process can be easily extrapolated for a specific treatment of real waste water containing the azo dye C.I Basic Red 46. Also, the intermediates that were produced during photodegradation process of Basic Red 46 were determined by GC/MS. (C) 2020 Published by Elsevier B.V. on behalf of King Saud University.
Published: 2020

25. High'Quality Carbon Nanotubes and Graphene Produced from MOFs for Supercapacitor Application

Author: Mandira Majumder, Ram Bilash Choudhary, Anukul K. Thakur, Rabah Boukherroub, Sabine Szunerits, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), NanoBioInterfaces - IEMN (NBI - IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)
Subjects: Supercapacitor, Materials science, Graphene, Nanotechnology, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, 021001 nanoscience & nanotechnology, 7. Clean energy, 01 natural sciences, 0104 chemical sciences, law.invention, Quality (physics), law, [CHIM]Chemical Sciences, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2020

26. Upon the effect of Zn during friction stir welding of aluminum-copper and aluminum-brass systems

Author: Maya Marinova, Roland Taillard, Toru Nagaoka, Marie-NoËlle Avettand-Fènoël, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Osaka Research Institute of Industrial Science and Technology, Institut Michel Eugène Chevreul - FR 2638 (IMEC), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), and Université d'Artois (UA)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL)
Subjects: brass, 0209 industrial biotechnology, Materials science, Friction stir welding, Strategy and Management, Flatness (systems theory), Mechanical properties, 02 engineering and technology, Welding, Management Science and Operations Research, Industrial and Manufacturing Engineering, law.invention, Brass, 020901 industrial engineering & automation, law, copper and zinc interlayer, Phase transformations, Composite material, Microstructure, Material flow, Filler metal, [CHIM.MATE]Chemical Sciences/Material chemistry, Interface, 021001 nanoscience & nanotechnology, Shear (sheet metal), Lap joint, visual_art, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], visual_art.visual_art_medium, 0210 nano-technology, Aluminum
Abstract: International audience; The present study deals with the effect of Zn on the linear friction stir lap welding of Al to Cu or to brass with a pinless tool. Zn was considered either as a filler metal or as an element in solid solution in α-brass. The lap joint configuration with a groove machined at the top of the bottom plate was chosen in order to test for the first time the influence of liquid Zn at the interface in case of melting by avoiding its ejection. Besides, the use of a pin free tool to join three millimeters thick plates is challenging. The paper presents and discusses the macrostructure and microstructure of the various joints together with their mechanical properties. A strong emphasis is given to the lubricating action of a liquid phase on the material flow as well as on the mechanisms of phase transformations at the various interfaces. The present work reports an early investigation of the material flow in linear friction stir lap welding with a pinless tool. The lap shear tensile fracture behavior of the welds is related to their interface morphology and microstructure. In particular, the fairly good shear resistance of the brass-Zn-Al joint arises from the composite nature of its interface despite its flatness and high thickness.
Published: 2020

27. A Review on High Pressure Experiments for Study of Crystallographic Behavior and Polymorphism of Pharmaceutical Materials

Author: Mathieu Guerain, Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), and Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
Subjects: Diffraction, Phase transition, Materials science, [SDV]Life Sciences [q-bio], Pharmaceutical Science, 02 engineering and technology, Crystal structure, Crystallography, X-Ray, Spectrum Analysis, Raman, 030226 pharmacology & pharmacy, Phase Transition, law.invention, 03 medical and health sciences, symbols.namesake, 0302 clinical medicine, law, Molecule, Crystallization, 021001 nanoscience & nanotechnology, Crystallography, Polymorphism (materials science), X-ray crystallography, symbols, Powders, 0210 nano-technology, Raman spectroscopy
Abstract: A review of work on pharmaceutical molecular materials studied under high pressure was carried out. The behavior of the crystallographic structure of these materials is observed under high pressure thanks to X-ray diffraction laboratory, synchrotron experiments or Raman spectroscopy. In particular, the highlighting of phase transitions and the discovery of new crystallographic forms are an important application of these methods. Works performed from the last two decades shows that two ways are mainly used: direct compression of powders or single crystals and crystallization under high pressure in different solvents. The evolution of the cell volumes and lattice parameters of different compounds have been observed with direct compression experiments of the order of few GPa to few tens of GPa. On few compounds the discovery of new polymorphic forms is highlighted. High pressure crystallization experiments generally require lower pressure ranges, on the order of few hundred to few GPa. For numerous pharmaceutical molecules, new polymorphs but also salts, solvates, hydrates or co-crystals can be obtained. It depends on the solvents and pressure ranges chosen. It shows the possibility to select the desired crystallographic form of a given active principle by a judicious choice of these parameters.
Published: 2020

28. A Review of Surface Haptics: Enabling Tactile Effects on Touch Surfaces

Author: Cagatay Basdogan, Seungmoon Choi, Vincent Levesque, Frédéric Giraud, Koç University, L2EP - Équipe Commande, Laboratoire d’Électrotechnique et d’Électronique de Puissance - ULR 2697 (L2EP), Centrale Lille-Haute Etude d'Ingénieurs-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM)-Centrale Lille-Haute Etude d'Ingénieurs-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Institut de Recherche sur les Composants logiciels et matériels pour l'Information et la Communication Avancé - USR 3380 (IRCICA), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Ecole de Technologie Supérieure [Montréal] (ETS), Pohang University of Science and Technology (POSTECH), C.B. acknowledges the financial support provided by The Scientific and Technological Research Council of Turkey (TUBITAK) under the contract no. 117E954. F.G. acknowledges the support of IRCICA, USR CNRS 3380. V.L. acknowledges the support of the Discovery Grant program of the Natural Sciences and Engineering Research Council (NSERC) of Canada., Méthodes et outils pour l'Interaction à gestes [MINT2], Institut de Recherche sur les Composants logiciels et matériels pour l'Information et la Communication Avancé - USR 3380 [IRCICA], Ecole de Technologie Supérieure [Montréal] [ETS], Pohang University of Science and Technology [POSTECH], Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Arts et Métiers Sciences et Technologies, and Université catholique de Lille (UCL)-Université catholique de Lille (UCL)
Subjects: FOS: Computer and information sciences, Surface (mathematics), surface haptics, tactile feedback, ultrasonic, InformationSystems_INFORMATIONINTERFACESANDPRESENTATION(e.g.,HCI), Computer science, Computer Science - Human-Computer Interaction, review, 02 engineering and technology, GeneralLiterature_MISCELLANEOUS, Human-Computer Interaction (cs.HC), Tactile stimuli, User-Computer Interface, Computer Science - Robotics, Feedback, Sensory, Human–computer interaction, 0202 electrical engineering, electronic engineering, information engineering, Humans, Electrovibration, friction modulation, ComputingMethodologies_COMPUTERGRAPHICS, Haptic technology, electrovibration, Active touch, [SPI.NRJ]Engineering Sciences [physics]/Electric power, 020207 software engineering, state of the art, 021001 nanoscience & nanotechnology, 3. Good health, Computer Science Applications, Human-Computer Interaction, Touch Perception, Touch, Computers, Handheld, Current technology, vibrotactile, 0210 nano-technology, Robotics (cs.RO), Mobile device
Abstract: We review the current technology underlying surface haptics that converts passive touch surfaces to active ones (machine haptics), our perception of tactile stimuli displayed through active touch surfaces (human haptics), their potential applications (human-machine interaction), and finally the challenges ahead of us in making them available through commercial systems. This review primarily covers the tactile interactions of human fingers or hands with surface-haptics displays by focusing on the three most popular actuation methods: vibrotactile, electrostatic, and ultrasonic., 21 pages, 177 references, review paper
Published: 2020

29. Tunable photo-responsive elastic metamaterials

Author: Antonio Gliozzi, Marco Miniaci, Benjamin Morin, Andrea Bergamini, Annalisa Chiappone, Emiliano Descrovi, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Acoustique - IEMN, Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Politecnico di Torino = Polytechnic of Turin (Polito), Acoustique - IEMN (ACOUSTIQUE - IEMN), Swiss Federal Laboratories for Materials Science and Technology [Dübendorf] (EMPA), and Norwegian University of Science and Technology (NTNU)
Subjects: Materials for devices, Frequency response, Materials science, Frequency band, Science, General Physics and Astronomy, Physics::Optics, 02 engineering and technology, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, Article, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI]Engineering Sciences [physics], 0103 physical sciences, Tunable metamaterials, lcsh:Science, 010306 general physics, Multidisciplinary, business.industry, Metamaterial, General Chemistry, Acoustic wave, Acoustics, 021001 nanoscience & nanotechnology, Elsatic Waves propagations, Magnetic field, Transmission (telecommunications), Metamaterials, Optoelectronics, Photoresponsive materials, lcsh:Q, 0210 nano-technology, business, Light field, Radio wave
Abstract: The metamaterial paradigm has allowed an unprecedented space-time control of various physical fields, including elastic and acoustic waves. Despite the wide variety of metamaterial configurations proposed so far, most of the existing solutions display a frequency response that cannot be tuned, once the structures are fabricated. Few exceptions include systems controlled by electric or magnetic fields, temperature, radio waves and mechanical stimuli, which may often be unpractical for real-world implementations. To overcome this limitation, we introduce here a polymeric 3D-printed elastic metamaterial whose transmission spectrum can be deterministically tuned by a light field. We demonstrate the reversible doubling of the width of an existing frequency band gap upon selective laser illumination. This feature is exploited to provide an elastic-switch functionality with a one-minute lag time, over one hundred cycles. In perspective, light-responsive components can bring substantial improvements to active devices for elastic wave control, such as beam-splitters, switches and filters., Here, the authors present a light-responsive elastic metamaterial whose transmission spectrum can be tuned by light stimuli. More specifically, we demonstrate that an appropriate laser illumination is effective in reversibly widening an existing frequency band gap, doubling its initial value.
Published: 2020

30. Friction-induced energy losses in mechanical contacts subject to random vibrations

Author: Antonio Papangelo, Vladislav Aleshin, Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Laboratoire International associé sur les phénomènes Critiques et Supercritiques en électronique fonctionnelle, acoustique et fluidique (LIA LICS/LEMAC), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Politecnico di Bari, Acoustique Impulsionnelle & Magnéto-Acoustique Non linéaire - Fluides, Interfaces Liquides & Micro-Systèmes - IEMN (AIMAN-FILMS-IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), and Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France)
Subjects: диссипация, Random vibrations, энергия, friction, 02 engineering and technology, Damping, Fractal dimension, Displacement (vector), Fractal, 0203 mechanical engineering, Method of memory diagrams, Annulus (firestop), Frictional dissipation, случайные колебания, General Materials Science, трение, Mechanical energy, [PHYS.MECA.VIBR]Physics [physics]/Mechanics [physics]/Vibrations [physics.class-ph], Physics, контактная механика, Applied Mathematics, Mechanical Engineering, Mechanics, Dissipation, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Vibration, Contact mechanics, 020303 mechanical engineering & transports, Mechanics of Materials, Modeling and Simulation, tribology, 0210 nano-technology, contact
Abstract: International audience; In this paper, we apply the previously developed Method of Memory Diagrams (MMD) to the description of an axisymmetric mechanical contact with friction subject to random vibrations. The MMD belongs to a family of semi-analytical methods of contact mechanics originating from the classical Cattaneo-Mindlin solution; it allows one to efficiently compute mechanical and energetic responses to complex excitation signals such as random or acoustic ones. For an axisymmetric contact driven by random normal and tangential displacements having fractal statistical properties, we calculate the friction-induced mechanical energy loss averaged over a large number of realizations. In the considered problem, this energy depends on a very restrained number of parameters: on the rms of random displacements, on the fractal dimension, and on the upper cut-off frequency of the fractal spectrum. In addition, a radial distribution of the dissipated energy has been obtained that has a direct relation to wear in the contact system. For small displacement amplitudes, wear should be expected in an annulus inside of a mean contact circle whereas for large displacements it will start at the contact center.
Published: 2020

31. Poly(ethylene oxide)/Poly(3,4-ethylenedioxythiophene):Poly(styrene sulfonate) (PEDOT:PSS) Blends: An Efficient Route to Highly Conductive Thermoplastic Materials for Melt-State Extrusion Processing ?

Author: Caroline Duc, Grégory Stoclet, Jérémie Soulestin, Cédric Samuel, Ecole nationale supérieure Mines-Télécom Lille Douai (IMT Lille Douai), Institut Mines-Télécom [Paris] (IMT), Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Technologie des Polymères et Composites & Ingénierie Mécanique (TPCIM), École des Mines de Douai (Mines Douai EMD), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Ministère de l'Économie, des Finances et de l'Industrie [Paris, France], Wallonia Region, Region Hauts-de-France, Region Auvergne-Rhone-Alpes, Region Bourgogne-Franche-Comte, Region Nouvelle-Aquitaine, Estonian Research Council, Agentschap Innoveren Ondernemen European Community (EC), European Union (EU), Chevreul Institute FR 2638, Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), and Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Ministère de l'Economie, des Finances et de l'Industrie
Subjects: Materials science, Polymers and Plastics, Oxide, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Styrene, chemistry.chemical_compound, PEDOT:PSS, Ethylene oxide, Process Chemistry and Technology, electronic conductivity, Organic Chemistry, technology, industry, and agriculture, extrusion processing, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, [CHIM.POLY]Chemical Sciences/Polymers, Sulfonate, chemistry, Chemical engineering, conductive thermoplastic, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Extrusion, Polymer blend, 0210 nano-technology, polymer blends, Poly(3,4-ethylenedioxythiophene)
Abstract: International audience; Blends of poly(ethylene oxide) (PEO) with poly- (3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PE- DOT:PSS) were investigated for the preparation of electrically conductive films using melt-state extrusion processing techniques. High molecular weight PEO is selected as a melting carrier to enable the extrusion processing of PEDOT:PSS. A drop-casting technique from aqueous solutions is first investigated to produce model PEO/PEDOT:PSS blends and identify the influence of relevant parameters on the final electronic conductivity. A low percolation threshold (approximately 9 wt % PEDOT:PSS into PEO) and high electronic conductivities (10−1000 S/cm) are detected. These performances are correlated to homogeneous blend morphologies and miscibility effects arising from strong PEO/PSS interactions detected by scanning electron microscopy coupled with energy dispersive X-ray spectroscopy (SEM-EDX), atomic force microscopy (AFM), and differential scanning calorimetry (DSC). Storage time and water ionic content have negative impacts on the electronic conductivity. The procedure was then adapted to prepare PEO-rich blends using twin-screw extrusion at 120 °C. A strong negative impact of the thermomechanical treatment was attested for PEO/PEDOT:PSS blends due to phase segregation phenomena induced by extrusion. However, an acidic post-treatment on extruded and molded thin films efficiently restored high electronic conductivities up to 4 S/cm for PEO-rich blends with 40 wt % PEDOT:PSS due to the removal of insulating phases. Such thermoplastic materials were found to be competitive with traditional thermoplastic solutions and thus represent efficient candidates for the development of thermoplastic electrodes using conventional and advanced processing technologies of the plastic industry.
Published: 2020

32. Formalism of Biological Tissues/Nanowire Sensor Interface Behavior

Author: Sun Bin, Nadine Saad, Hilal Reda, Georges Nassar, Marwa Sawan, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Matériaux et Acoustiques pour MIcro et NAno systèmes intégrés - IEMN (MAMINA - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520 (IEMN-DOAE), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Faculty of Engineering [Lebanese University] (ULFG), Lebanese University [Beirut] (LU), INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), and Institut National des Sciences Appliquées (INSA)
Subjects: Materials science, Interface (Java), Formalism (philosophy), Nanowire, substrate, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI]Engineering Sciences [physics], sensor, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Biological tissues, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], General Neuroscience, Kelvin, Voigt, General Medicine, 021001 nanoscience & nanotechnology, 0104 chemical sciences, adhesion, Classical mechanics, interface, biomechanical behavior, 0210 nano-technology, General Agricultural and Biological Sciences
Abstract: International audience; In this paper, we investigate the behaviour of biological tissues (skin) coupled to a flexible sensor embedded at a solid substrate based on a numerical model taking into account the relationship between strain/stress components at the interface. Based on this study, the most appropriate biomechanical factors are understood and quantified in order to optimize the sensor/biological tissue interface conditions. A micromechanical description based on a mathematical formulation has been developed to evaluate the biomechanical behaviour provided by a 2D viscoelastic model of Kelvin-Voigt. Based on the results, it appears that the model can be used effectively to characterize in-vivo the dynamic properties of soft tissues in order to adapt the biophysical properties of flexible sensors dedicated to optimal adhesion
Published: 2020

33. Bilayer Intumescent Paint Metal Laminates: A Novel Design for a High-Performance Fire Barrier

Author: Fabienne Samyn, Maude Jimenez, Serge Bourbigot, Laura Geoffroy, Université de Lille, CNRS, INRA, ENSCL, Unité Matériaux et Transformations (UMET) - UMR 8207, Unité Matériaux et Transformations - UMR 8207 [UMET], Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), European Project: 670747,H2020,ERC-2014-ADG,FireBar-Concept(2016), and Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL)
Subjects: Materials science, General Chemical Engineering, chemistry.chemical_element, Bilayer Intumescent Paint Metal Laminates, 02 engineering and technology, engineering.material, Industrial and Manufacturing Engineering, High-Performance Fire Barrier, Metal, 020401 chemical engineering, Coating, Aluminium, Fire protection, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, 0204 chemical engineering, Composite material, Bilayer, [CHIM.MATE]Chemical Sciences/Material chemistry, General Chemistry, 021001 nanoscience & nanotechnology, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, visual_art, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], visual_art.visual_art_medium, engineering, 0210 nano-technology, Intumescent
Abstract: New fire barriers combining the use of two different intumescent paints and a metal laminate structure have been evaluated for the protection of steel. Different bilayer designs have been considered and are composed of an overlay of two intumescent coatings with or without aluminum foils. All laminated bilayers were exposed to fire in a high-temperature environment (116 kW/m2). The design with two aluminum foils and the overlay of both intumescent coatings reveals efficient fire protection with stabilization at low temperatures after 30 min of fire exposure. This design exhibits much higher performance than that of the conventional intumescent coating. Characterizations (cross-sectional observations, expansion measurements, and pull-off tests) were performed for all samples to clarify the mechanism of action. This paper reveals a new way of thinking and highlights that working on the design instead of changing the formulation of the intumescent paint allows us to reach an efficient fire-resistant barrier. 59;7
Published: 2020

34. Selective Deposition of Cobalt and Copper Oxides on BiVO 4 Facets for Enhancement of CO 2 Photocatalytic Reduction to Hydrocarbons

Author: Andrei Y. Khodakov, Vitaly V. Ordomsky, Xiang Yu, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Eco-Efficient Products &Processes Laboratory (E2PL2), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-RHODIA, Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Eco-Efficient Products & Processes Laboratory (E2P2L), and RHODIA-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Inorganic chemistry, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, 7. Clean energy, Catalysis, Inorganic Chemistry, Reduction (complexity), chemistry.chemical_compound, [CHIM]Chemical Sciences, Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS, Organic Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, Selective deposition, Copper, 0104 chemical sciences, chemistry, Bismuth vanadate, Photocatalysis, 0210 nano-technology, Cobalt
Abstract: International audience; The nanostructure of a semiconductor is a crucial parameter for efficient photocatalytic performance. Hereby, we have synthesized monoclinic bismuth vanadate (BiVO4) crystals with controlled ratio of {010} and {110} facets. The selective deposition of CuOx and CoOx over {010} and {110} facets has been performed using photo-reduction and photo-oxidation methods, respectively. It resulted in a highly efficient charge separation of photogenerated electrons and holes and enhancement of the photocatalytic reduction of CO2 by H2O into hydrocarbons, including CH4, C2H6 and C3H8. The controlled co-catalyst deposition over different semiconductor facets provides a strategy for the synthesis of hydrocarbons from CO2 and H2O by efficient charge separation.
Published: 2020

35. Mobility and versatility of the liquid bismuth promoter in the working iron catalysts for light olefin synthesis from syngas

Author: Mykhailo Vorokhta, Alan J. Barrios, Mounib Bahri, Bang Gu, Andrei Y. Khodakov, Ovidiu Ersen, Eric Marceau, Robert Wojcieszak, Vitaly V. Ordomsky, Deizi V. Peron, Dipanjan Banerjee, Břetislav Šmíd, Mirella Virginie, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA), Institute of Resource Ecology [Dresden], Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Charles University [Prague] (CU), European Synchroton Radiation Facility [Grenoble] (ESRF), ANR-16-CE06-0013,NANO4FuT,Synthèse des carburants alternatifs et des molécules plateforme sur nanoréacteurs(2016), Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Institut de Physique et Chimie des Matériaux de Strasbourg [IPCMS], and Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille
Subjects: MECHANISM, inorganic chemicals, Materials science, FISCHER-TROPSCH SYNTHESIS, Chemistry, Multidisciplinary, chemistry.chemical_element, 02 engineering and technology, Carbon nanotube, 010402 general chemistry, CARBON NANOTUBES, 01 natural sciences, Catalysis, Bismuth, law.invention, ACTIVATION, Reaction rate, chemistry.chemical_compound, Adsorption, law, NANOPARTICLES, HYDROGENATION, KINETICS, ComputingMilieux_MISCELLANEOUS, Olefin fiber, Science & Technology, SPECTROSCOPY, HETEROGENEOUS CATALYSTS, [CHIM.MATE]Chemical Sciences/Material chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, CO, Chemistry, chemistry, Chemical engineering, Physical Sciences, 0210 nano-technology, Syngas, Carbon monoxide
Abstract: Localization and migration of highly mobile and extremely efficient bismuth promoter in iron Fischer–Tropsch catalysts were elucidated using in situ methods., Liquid metals are a new emerging and rapidly growing class of materials and can be considered as efficient promoters and active phases for heterogeneous catalysts for sustainable processes. Because of low cost, high selectivity and flexibility, iron-based catalysts are the catalysts of choice for light olefin synthesis via Fischer–Tropsch reaction. Promotion of iron catalysts supported by carbon nanotubes with bismuth, which is liquid under the reaction conditions, results in a several fold increase in the reaction rate and in a much higher light olefin selectivity. In order to elucidate the spectacular enhancement of the catalytic performance, we conducted extensive in-depth characterization of the bismuth-promoted iron catalysts under the reacting gas and reaction temperatures by a combination of cutting-edge in situ techniques: in situ scanning transmission electron microscopy, near-atmospheric pressure X-ray photoelectron spectroscopy and in situ X-ray adsorption near edge structure. In situ scanning transmission electron microscopy conducted under atmospheric pressure of carbon monoxide at the temperature of catalyst activation showed iron sintering proceeding via the particle migration and coalescence mechanism. Catalyst activation in carbon monoxide and in syngas leads to liquid bismuth metallic species, which readily migrate over the catalyst surface with the formation of larger spherical bismuth droplets and iron–bismuth core–shell structures. In the working catalysts, during Fischer–Tropsch synthesis, metallic bismuth located at the interface of iron species undergoes continuous oxidation and reduction cycles, which facilitate carbon monoxide dissociation and result in the substantial increase in the reaction rate.
Published: 2020

36. The Fischer–Tropsch reaction in the aqueous phase over rhodium catalysts: a promising route to selective synthesis and separation of oxygenates and hydrocarbons

Author: Alan J. Barrios, Vitaly V. Ordomsky, Andrei Y. Khodakov, Nataliya E. Borisova, Aleksandra S. Peregudova, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and ANR-16-CE06-0013,NANO4FuT,Synthèse des carburants alternatifs et des molécules plateforme sur nanoréacteurs(2016)
Subjects: chemistry.chemical_element, Alcohol, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Catalysis, Rhodium, Metal, chemistry.chemical_compound, Materials Chemistry, [CHIM]Chemical Sciences, ComputingMilieux_MISCELLANEOUS, Oxygenate, Metals and Alloys, Aqueous two-phase system, Fischer–Tropsch process, [CHIM.CATA]Chemical Sciences/Catalysis, General Chemistry, 021001 nanoscience & nanotechnology, Combinatorial chemistry, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry, visual_art, Ceramics and Composites, visual_art.visual_art_medium, 0210 nano-technology, Selectivity
Abstract: In the present communication, we uncovered the aqueous phase Fischer-Tropsch reaction over rhodium catalysts. The reaction results in the synthesis and consecutive separation of hydrocarbons and oxygenates into two phases. Use of a rhodium Schiff base complex as a precursor for catalyst preparation allows efficient control of the Rh metal nanoparticle size distribution and leads to higher alcohol selectivity.
Published: 2020

37. Photothermal Activatable Mucoadhesive Fiber Mats for On-Demand Delivery of Insulin via Buccal and Corneal Mucosa

Author: Anna Voronova, Cristina Prieto, Maria Pardo-Figuerez, Jose Maria Lagaron, Amitav Sanyal, Bilal Demir, Thomas Hubert, Valerie Plaisance, Valerie Pawlowski, Séverine Vignoud-Despond, Alexandre Barras, Amar Abderrahmani, Rabah Boukherroub, Sabine Szunerits, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), European Union's Horizon 2020 Research and Innovation Staff Exchange (RISE) Marie Skłodowska-Curie Actions under grant agreement No 690836., European Project: 690836,H2020,H2020-MSCA-RISE-2015,PANG(2016), Centre National de la Recherche Scientifique (France), Université de Lille, and European commission
Subjects: Swine, Biomedical Engineering, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, reduced graphene oxide, Biomaterials, Cornea, [SPI]Engineering Sciences [physics], on-demand release, Insulin, Regular, Human, Animals, Humans, Insulin, [CHIM]Chemical Sciences, mucoadhesive buccal mucosa, Ensure healthy lives and promote well-being for all at all ages, electrospinning, Biochemistry (medical), Mouth Mucosa, Administration, Buccal, Hydrogels, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, 3. Good health, Buccal mucosa, Mucoadhesive, 0210 nano-technology
Abstract: Electrospun fiber mats loaded with therapeutics have gained considerable attention as a versatile tool in the biomedical field. While these bandages are largely based on fast-dissolving polymers to release the cargo, stimuli-responsive fiber mats have the advantages of providing a timely and spatially controlled drug delivery platform, which can be refilled and reused several times. These benefits make electrospun fiber patches original platforms for painless and convenient on-demand hormone release. Because of the high need of more convenient and non-invasive methods for delivering insulin, a hormone that is currently used to treat hundred million people with diabetes worldwide, we have investigated the tremendous potential of reduced graphene oxide modified poly(acrylic acid) based fiber mats as an original platform for buccal and corneal insulin delivery on-demand. The PAA@rGO hydrogel-like fibers rendered water-insoluble by incorporating β-cyclodextrin, followed by thermal cross-linking, which showed adequate tensile strength along with high adsorption capacity of insulin at pH 7 and good recyclability. The fiber mats maintained good fibrous morphology and high loading efficiency even after five loading-release cycles. The mucoadhesive nature of the fibers allowed their application for insulin delivery via the eye cornea and the buccal mouth lining, as evidenced in ex vivo studies. Insulin loaded PAA@rGO hydrogel-like fibers showed an insulin flux via buccal lining of pigs of 16.6 ± 2.9 μg cm-2 h-1 and 24.3 ± 3.1 μg cm-2 h-1 for porcine cornea. Testing on healthy adult volunteers confirmed the excellent, mucoadhesive nature of the bandage, with three out of six volunteers feeling completely comfortable (note 8.3) while wearing the patches in the buccal cavity., The Centre National de la Recherche Scientifique (CNRS), the University of Lille, the Hauts-de-France region, and the CPER “Photonics for Society” are acknowledged for financial support. This work was partly supported by the French Renatech network. A.V. thanks the i-SITE foundation of the University of Lille for a PhD fellowship. This project has received funding from the European Union’s Horizon 2020 Research and Innovation Staff Exchange (RISE) Marie Skłodowska-Curie Actions under grant agreement No 690836.
Published: 2022

38. Relationship between design strategies of commercial three-way monolithic catalysts and their performances in realistic conditions

Author: André Nicolle, Christophe Chaillou, Caroline Norsic, Shreya Nandi, Christophe Dujardin, Emmanuel Laigle, Pascal Granger, Paola Arango, Melissandre Richard, Université de Lille, CNRS, Centrale Lille, ENSCL, Univ. Artois, Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Unité de Catalyse et Chimie du Solide (UCCS) - UMR 8181, Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), and Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Cost effectiveness, Automotive industry, Three-way catalysis, 02 engineering and technology, engineering.material, Monolithic Catalyst, Commercial Strategies, Washcoat, Emission control, 010402 general chemistry, 01 natural sciences, Catalysis, Reduction (complexity), Gasoline, Process engineering, NOx, business.industry, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, 0104 chemical sciences, engineering, Noble metal, 0210 nano-technology, Science, technology and society, business
Abstract: International audience; Monolith-shaped three-way catalysts (TWC) are always at the edge of science and technology as a response to the stringent updates on the emission standards worldwide. In spite of rapid research on TWC materials, the exact compositions adapted by major automotive companies are not fully known. This study focuses on comparing two fresh commercial monolithic catalysts for gasoline engines, namely, monolith-A and monolith-B, to highlight the significance of their manufacturing strategies by its characterization and catalytic evaluation under realistic lean/rich/stoichiometric regimes. Firstly, monolith-A demonstrates a zoning on its front and back side with high Pd and Rh loading to enhance CO/HC oxidation and NOx reduction, respectively, having higher amounts of trace dopants like La, Y, Pr and S. Whereas, monolith-B has a homogeneous composition with much lower noble metal/trace elements content without any Pr and S. Secondly, the double-layer washcoating is employed by following different routes with distinct compositions of alumina and ceria-zirconia. Monolith-B showed better low temperature CO oxidation performance while monolith-A performed better for NOx reduction owing to higher Rh loading. Overall, the zoning strategy of monolith-A raises question on its cost effectiveness in regards to its performance while poor reduction capabilities is exhibited by monolith-B. This study highlights that the latest TWC strategies have a scope of further development particularly with respect to the catalytic performance/expense ratio.
Published: 2022

39. Quantization of Acoustic Modes in Dumbbell Nanoparticles

Author: Zuyuan Wang, Hojin Kim, Maria Secchi, Maurizio Montagna, Eric M. Furst, Bahram Djafari-Rouhani, George Fytas, Max Planck Institute for Polymer Research, Max-Planck-Gesellschaft, University of Delaware [Newark], University of Trento [Trento], Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Physique - IEMN (PHYSIQUE - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), This work was financially supported by ERC AdG SmartPhon (Grant No. 694977). E. M. F. acknowledges that this material is based upon work supported by the National Science Foundation under Grant No. CBET- 1637991., and Open access publication funded by the Max Planck Society.
Subjects: Condensed Matter::Soft Condensed Matter, [SPI]Engineering Sciences [physics], Scattering theory, 0103 physical sciences, Light-matter interaction, General Physics and Astronomy, 02 engineering and technology, 021001 nanoscience & nanotechnology, 010306 general physics, 0210 nano-technology, 01 natural sciences
Abstract: International audience; The vibrational eigenmodes of dumbbell-shaped polystyrene nanoparticles are recorded by Brillouinlight spectroscopy (BLS), and the full experimental spectra are calculated theoretically. Different fromspheres with a degeneracy of (2l + 1), with l being the angular momentum quantum number, theeigenmodes of dumbbells are either singly or doubly degenerate owing to their axial symmetry. The BLSspectrum reveals a new, low-frequency peak, which is attributed to the out-of-phase vibration of the twolobes of the dumbbell. The quantization of acoustic modes in these molecule-shaped dumbbell particlesevolves from the primary colloidal spheres as the separation between the two lobes increases
Published: 2022

40. Facile and secure synthesis of porous partially fluorinated graphene employing weakly coordinating anion for enhanced high-performance symmetric supercapacitor

Author: Qingguo Shao, Rabah Boukherroub, Mingle Liu, Yinghui Cai, Ning Cao, Xiaobei Zang, Teng Wang, Liu Peng, Fashun Li, Yijiang Qin, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), China University of Petroleum, and This work was supported by National Natural Science Foundation of China (21905304), Natural Science Foundation of Shandong Province (ZX20210028) and the Fundamental Research Funds for the Central Universities (19CX05001A).
Subjects: Materials science, Semi-ionic C F bonds, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, Electrochemistry, 01 natural sciences, Capacitance, Ion, law.invention, [SPI]Engineering Sciences [physics], Weakly coordinating anion, law, Partially fluorinated graphene, Supercapacitors, [CHIM]Chemical Sciences, Porosity, Supercapacitor, Graphene, Metals and Alloys, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Chemical engineering, chemistry, Fluorine, 0210 nano-technology, Current density
Abstract: International audience; In this paper, porous partially fluorinated graphene (PFG) for supercapacitors (SCs) was fabricated by a mild and secure one-pot hydrothermal method utilizing weakly coordinating anion BF4− as the fluorine source. The hydrolysis rate of sodium fluoroborate was adjusted by controlling the reaction temperature and PFG containing semi-ionic Csingle bondF bonds was obtained, where the content of semi-ionic Csingle bondF bonds in PFG can be easily regulated. The final experimental results show that the incorporation of fluorine not only modulates the electrochemical properties of the material, but also creates abundant pores. When assembled in a symmetric supercapacitor, the PFG shows a high specific capacitance of 269.7 F g−1 at 1 A g−1 and a superior rate capability with 89.3% capacitance retained, as the current density is increased from 1 A g−1 even to 20 A g−1. Furthermore, the resultant energy density for PFG is 9.4 Wh kg−1 at a power density of 250.0 W kg−1 (1 A g−1). All these results confirm that as-prepared partially fluorinated graphene is appropriate for the application in SCs and mass production.
Published: 2022

41. A comprehensive static modeling methodology via beam theory for compliant mechanisms

Author: Gang Zheng, Ke Wu, Deformable Robots Simulation Team (DEFROST ), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: Timoshenko beam theory, 0209 industrial biotechnology, Computer science, Mechanical engineering, Euler-Bernoulli Beam Theory, Bioengineering, 02 engineering and technology, General Planar Beams, Nonlinear Static Modeling, 020901 industrial engineering & automation, Deflection (engineering), Collocation method, Numerical Methods, [INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO], Boundary value problem, Compliant Mechanisms, ComputingMilieux_MISCELLANEOUS, Compliant Mechanisms General Planar Beams Euler-Bernoulli Beam Theory Nonlinear Static Modeling Ordinary Differential Equation (ODE) Boundary Value Problem (BVP) Numerical Methods, Mechanical Engineering, Ode, Compliant mechanism, 021001 nanoscience & nanotechnology, Computer Science Applications, Boundary Value Problem (BVP), Mechanics of Materials, Ordinary differential equation, Ordinary Differential Equation (ODE), 0210 nano-technology, Beam (structure)
Abstract: International audience; Compliant Mechanisms (CMs) present several desired properties for mechanical applications only depending on elastic deformation of the involved compliant beams/flexures. As reported in the current literature, most CM designs utilize straight beams and initially curved beams (ICBs) as the fundamental flexible members. In CM research community, many great contributions regarding modeling these elementary flexible members have been achieved. In this paper, a comprehensive modeling methodology, based on beam theory, has been established to characterize the static planar deflection of slender beam. Then such a methodology has been applied to solve 8 loading scenarios of large beam-deflection problems that exist in the design of CMs. Essentially speaking, all these beam-deflection problems are treated as a type of boundary value problems (BVPs) of an ordinary differential equation (ODE) and solved by a modified collocation method. After that, this methodology has been used to model some representative CMs with large-deflection strokes, such as compliant parallelograms.
Published: 2022

42. Combination of selective area sublimation of p-GaN and regrowth of AlGaN for the co-integration of enhancement mode and depletion mode high electron mobility transistors

Author: Nicolas Defrance, Thi Huong Ngo, Eric Frayssinet, Benjamin Damilano, Flavien Cozette, Rémi Comyn, Stéphane Vézian, Hassan Maher, Julien Brault, Nathalie Labat, F. Lecourt, Yvon Cordier, Sébastien Chenot, Centre de recherche sur l'hétéroepitaxie et ses applications (CRHEA), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Institut Interdisciplinaire d'Innovation Technologique [Sherbrooke] (3IT), Université de Sherbrooke (UdeS), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Puissance - IEMN (PUISSANCE - IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), OMMIC, Laboratoire de l'intégration, du matériau au système (IMS), Université Sciences et Technologies - Bordeaux 1-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), Laboratoire Nanotechnologies et Nanosystèmes [Sherbrooke] (LN2), Université de Sherbrooke (UdeS)-École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), This work was supported by French technology facility network RENATECH and the French National Research Agency (ANR) through the projects ED-GaN (ANR-16-CE24-0026) and the 'Investissements d’Avenir' program GaNeX (ANR-11-LABX-0014)., Renatech Network, ANR-16-CE24-0026,ED-GaN,Co-intégration des transistors GaN à enrichissement et à déplétion pour les circuits de communication RF de la prochaine génération(2016), ANR-11-LABX-0014,GANEX,Réseau national sur GaN(2011), Université Nice Sophia Antipolis (1965 - 2019) (UNS), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université Sciences et Technologies - Bordeaux 1 (UB)-Institut Polytechnique de Bordeaux-Centre National de la Recherche Scientifique (CNRS), and Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Institut National des Sciences Appliquées de Lyon (INSA Lyon)
Subjects: Fabrication, Materials science, Evaporation, Regrowth, 02 engineering and technology, High-electron-mobility transistor, law.invention, GaN, [SPI.MAT]Engineering Sciences [physics]/Materials, Barrier layer, law, 0202 electrical engineering, electronic engineering, information engineering, Materials Chemistry, Electrical and Electronic Engineering, High electron, HEMT, business.industry, 020208 electrical & electronic engineering, Transistor, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, [SPI.TRON]Engineering Sciences [physics]/Electronics, Selective sublimation, Optoelectronics, Sublimation (phase transition), 0210 nano-technology, business, Layer (electronics)
Abstract: International audience; We report on the fabrication of an enhancement mode p-GaN/AlN/GaN high electron mobility transistor with selective area sublimation under vacuum of the p-GaN cap layer. The GaN evaporation selectivity is demonstrated on the thin 2 nm AlN barrier layer. Furthermore, the regrowth of AlGaN is a major key to increase the maximum drain current in the transistors and enables the co-integration with depletion mode devices.
Published: 2022

43. Polydopamine treatment of chitosan nanofibers for the conception of osteoinductive scaffolds for bone reconstruction

Author: Nicolas Tabary, Bernard Martel, Syrine Dimassi, Jean-Christophe Hornez, Nicolas Blanchemain, Frederic Cazaux, Feng Chai, Cédric Zobrist, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Médicaments et biomatériaux à libération contrôlée: mécanismes et optimisation - Advanced Drug Delivery Systems - U 1008 (MBLC - ADDS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Laboratoire de Matériaux Céramiques et de Mathématiques (CERAMATHS), Université Polytechnique Hauts-de-France (UPHF)-INSA Institut National des Sciences Appliquées Hauts-de-France (INSA Hauts-De-France), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centrale Lille Institut (CLIL), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Université de Lille, and Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 (LMCPA)
Subjects: Polydopamine, Materials science, Bone Regeneration, Indoles, Polymers and Plastics, Polymers, Nanofibers, 02 engineering and technology, engineering.material, Cell Line, Hydroxyapatite, Bone tissue engineering, Chitosan, 03 medical and health sciences, chemistry.chemical_compound, Mice, Coating, Osteogenesis, Spectroscopy, Fourier Transform Infrared, Materials Chemistry, Animals, Fourier transform infrared spectroscopy, Bone regeneration, 030304 developmental biology, Scaffolds, 0303 health sciences, Tissue Engineering, Tissue Scaffolds, Electrospinning, Organic Chemistry, Sem analysis, 021001 nanoscience & nanotechnology, Durapatite, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Chemical engineering, Nanofiber, engineering, Microscopy, Electron, Scanning, 0210 nano-technology, Biomineralization
Abstract: We report the influence of treatment time of electrospun chitosan nanofibers (CHT NFs) in dopamine hydrochloride bath (2 mg.mL−1 in 10 mM Tris buffer, pH 8.5) on the extent of the polydopamine (pDA) coating on NFs surface. The reaction was characterized by FTIR and SEM analysis and the cytocompatibility of the scaffolds toward MT3C3-E1 cells was assessed. Biomimetic deposition of hydroxyapatite (HA) in 1.5xSBF batch was investigated by SEM-EDS and XRD. Samples treated in dopamine bath during 2 h promoted the structural stability of NFs in PBS, provided optimal cytocompatibility and induced the in vitro biomineralization from 6 days in 1.5xSBF. The XRD and SEM-EDS investigations confirmed formation of spherical-shaped particles composed of apatitic phase. Finally, this study shows that these NFs-pDA scaffolds prepared in the optimal experimental conditions defined here are promising candidates for application as osteoinductive scaffolds for bone regeneration applied to orthopedic and dental applications.
Published: 2022

44. Heat treatment of commercial polydimethylsiloxane PDMS precursors: Part II. Thermal properties of carbon-based ceramic nanocomposites

Author: Srisaran Venkatachalam, Djamila Hourlier, Abdelhak Hadj Sahraoui, Michael Depriester, Stéphane Lenfant, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), EPItaxie et PHYsique des hétérostructures - IEMN (EPIPHY - IEMN), Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-Centrale Lille-Institut supérieur de l'électronique et du numérique (ISEN)-Université de Valenciennes et du Hainaut-Cambrésis (UVHC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF), Nanostructures, nanoComponents & Molecules - IEMN (NCM - IEMN), Unité de Dynamique et Structure des Matériaux Moléculaires (UDSMM), and Université du Littoral Côte d'Opale (ULCO)
Subjects: Materials science, chemistry.chemical_element, 02 engineering and technology, Elastomer, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, [SPI]Engineering Sciences [physics], chemistry.chemical_compound, Thermal conductivity, 0103 physical sciences, Thermoelectric effect, Electrical conductivity, Materials Chemistry, Polymer-derived ceramics, [CHIM]Chemical Sciences, Ceramic, ComputingMilieux_MISCELLANEOUS, 010302 applied physics, Polydimethylsiloxane, Nanocomposite, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Process Chemistry and Technology, [SPI.NRJ]Engineering Sciences [physics]/Electric power, [CHIM.MATE]Chemical Sciences/Material chemistry, 021001 nanoscience & nanotechnology, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Chemical engineering, visual_art, Thermoelectric response, Ceramics and Composites, visual_art.visual_art_medium, 0210 nano-technology, Pyrolysis, Carbon
Abstract: Part A; International audience; Organosilicon polymer-derived ceramic (PDC) materials have been extensively studied for their various properties such as mechanical, chemical and electrical properties. One of the least explored properties of PDC is their thermal properties, required for designing a heat energy converter. In this work, a commercially available polydimethylsiloxane elastomer is used as starting polymeric precursor. Pyrolysis of cross-linked gels conducted in inert atmosphere above 1000 °C yielded silicon oxycarbide SiOxCy, as revealed by X-ray diffraction analysis. The complex shapes of the gels are retained even after pyrolysis up to 1500 °C, however a linear shrinkage ratio of 25–30% is observed. Both thermal and electrical conductivity of free carbon based SiOxCy residues are found to rise simultaneously as the heat treatment temperature increased. The sample heat-treated at 1500 °C exhibits the room temperature thermal conductivity of 2.24 Wm-1K-1 and electrical conductivity of 0.021 S cm-1. These properties of PDCs suggest their appealing applications as a functional material in thermoelectric devices.
Published: 2019

45. Foamed geopolymers for fire protection: Burn‐through testing and modeling

Author: Serge Bourbigot, Johan Sarazin, Catherine A. Davy, Gaëlle Fontaine, Unité Matériaux et Transformations - UMR 8207 (UMET), Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centrale Lille, European Project: 670747,H2020,ERC-2014-ADG,FireBar-Concept(2016), Université de Lille, CNRS, INRA, ENSCL, Unité Matériaux et Transformations (UMET) - UMR 8207, and 174496|||Unité Matériaux et Transformations - UMR 8207 [UMET]
Subjects: Polymers and Plastics, Metals and Alloys, coating, modeling, 02 engineering and technology, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Electronic, Optical and Magnetic Materials, geopolymer, numerical simulation, fire protection, [CHIM.POLY]Chemical Sciences/Polymers, 13. Climate action, Ceramics and Composites, 0210 nano-technology
Abstract: International audience; Geopolymer (GP) foam as a fire protective coating was synthesized, deposited on a steel plate, hardened and evaluated using a burn-through test at a reduced scale. It was shown that the GP foam acts as an efficient fire barrier (with 250°C reduction compared to virgin steel evaluated in the same conditions). A numerical model using Comsol Multiphysics® (finite element code) was performed to simulate the fire behavior of the GP foam. It was based on the complete characterization of the GP foam to provide accurate input data for the model. The latter captures well the temperature rise, including the endothermal effect due to water vaporization. A parametric study of the porosity and the emissivity at the surface of the GP foam brings new insights to optimize the performance of the GP foam. It is shown that a porosity of 90% and an emissivity lower than 0.75 should provide the highest performance to GP foam. The fabrication of an optimized GP foam is feasible using a technology of low emissivity thin coating and by adjusting the synthesis of the GP foam to increase its porosity.
Published: 2021

46. Passivation of miniature microwave coplanar waveguides using a thin film fluoropolymer electret

Author: Jaouad Marzouk, Vanessa Avramovic, David Guérin, Steve Arscott, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), Plateforme de Caractérisation Multi-Physiques - IEMN (PCMP - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Centrale de Micro Nano Fabrication - IEMN (CMNF - IEMN), Nano and Microsystems - IEMN (NAM6 - IEMN), The work was partly funded by the French RENATECH network. The digital microscope was purchased within the `TIPTOP_1' project (ANR-16-CE09-0029). We would like to thank Research Engineers Francois Vaurette for technical help with the electron beam lithography, Annie Fattorini and Marc Dewitte for technical help with the metallization, Laurent Fugere for technical help with the ion implantation, and Dmitri Yarekha for technical help with the deep silicon etching. S. A. wishes to thank Jean-Pierre Vilcot for the use of the large-band power meter., Renatech Network, PCMP CHOP, and ANR-16-CE09-0029,TIPTOP_1,Fabrication de leviers de microscopie à force atomique pour des applications de spectroscopie Raman à exaltation de pointe(2016)
Subjects: 010302 applied physics, Multidisciplinary, Science, Physics, Electronics, photonics and device physics, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Article, Electrical and electronic engineering, [SPI]Engineering Sciences [physics], Engineering, 0103 physical sciences, Medicine, 0210 nano-technology
Abstract: The insertion losses of miniature gold/silicon-on-insulator (SOI) coplanar waveguides (CPW) are rendered low, stable, and light insensitive when covered with a thin film (95 nm) fluoropolymer deposited by a trifluoromethane (CHF3) plasma. Microwave characterization (0–50 GHz) of the CPWs indicates that the fluoropolymer stabilizes a hydrogen-passivated silicon surface between the CPW tracks. The hydrophobic nature of the fluoropolymer acts as a humidity barrier, meaning that the underlying intertrack silicon surfaces do not re-oxidize over time—something that is known to increase losses. In addition, the fluoropolymer thin film also renders the CPW insertion losses insensitive to illumination with white light (2400 lx)—something potentially advantageous when using optical microscopy observations during microwave measurements. Capacitance–voltage (CV) measurements of gold/fluoropolymer/silicon metal–insulator-semiconductor (MIS) capacitors indicate that the fluoropolymer is an electret—storing positive charge. The experimental results suggest that the stored positive charge in the fluoropolymer electret and charge trapping influence surface-associated losses in CPW—MIS device modelling supports this. Finally, and on a practical note, the thin fluoropolymer film is easily pierced by commercial microwave probes and does not adhere to them—facilitating the repeatable and reproducible characterization of microwave electronic circuitry passivated by thin fluoropolymer.
Published: 2021

47. Chemical interaction between uranium dioxide, boron carbide and stainless steel at 1900 °C — Application to a severe accident scenario in sodium cooled fast reactors

Author: Christine Guéneau, Emmanuelle Brackx, Mathieu Garrigue, Matthieu Touzin, Thierry Alpettaz, Christophe Bonnet, Olivier Tougait, Andrea Quaini, Renaud Domenger, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Paris-Saclay, Université de Montpellier (UM), Unité Matériaux et Transformations - UMR 8207 (UMET), Institut de Chimie du CNRS (INC)-Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université de Lille-Ecole Nationale Supérieure de Chimie de Lille (ENSCL), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), and Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Supérieure de Chimie de Lille (ENSCL)-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nuclear and High Energy Physics, Materials science, Sodium fast reactor, Uranium dioxide, Neutron poison, chemistry.chemical_element, 02 engineering and technology, Boron carbide, UO2, B4C, 7. Clean energy, 01 natural sciences, Stainless steel, chemistry.chemical_compound, General Materials Science, Carbo-reduction, MOX fuel, Severe accident, 010401 analytical chemistry, Metallurgy, [CHIM.MATE]Chemical Sciences/Material chemistry, Uranium, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Plutonium, Nuclear Energy and Engineering, chemistry, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Mixed oxide, Wetting, 0210 nano-technology
Abstract: International audience; For the understanding of severe accidents in sodium cooled fast reactors (SFR), it is necessary to understand two prototypic accident scenarios such as ULOF (Unprotected Loss of Flow Accident) and UTOP (Unprotected Transient OverPower). As the base knowledge, it is also important to understand high temperature chemical interaction among major core materials such as MOx fuel (MOx: mixed oxide of uranium and plutonium), steel cladding and B4C neutron absorber have to be investigated. This study aims at providing experimental data on phase formation and phase-stability at various temperature and pressure conditions. A first series of samples containing a mixture of B4C and steel were prepared to obtain a homogenous metallic solid. In a second step, these metallic samples were mixed and melted with small UO2 pieces by arc melting. Then these samples underwent a heat treatment at 1900 °C for 1 hour. EDS, EBSD and EPMA analyses were performed to identify the phases formed during the solidification. In addition, thermodynamic calculations were performed for the interpretation of the results, revealing that a carbo-reduction reaction occurs: UO2 + 2 C = 2 CO + U. A significant amount of uranium from the fuel is dissolved in the metallic liquid phase, leading to the formation of mixed borides (UM3B2, UMB4, UM4B, M=Fe,Cr,Ni). In comparison with the UO2/steel interaction, the present results show that the presence of B and C in the melt improves the wetting behaviour of the metallic liquid towards UO2.
Published: 2021

48. Theoretical Analysis on Nonlinear Buckling, Post-Buckling of Slender Beams and Bi-Stable Mechanisms

Author: Gang Zheng, Ke Wu, Deformable Robots Simulation Team (DEFROST ), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, business.industry, Mechanical Engineering, 02 engineering and technology, Structural engineering, 021001 nanoscience & nanotechnology, 020303 mechanical engineering & transports, Bi stable, 0203 mechanical engineering, Buckling, [INFO.INFO-RB]Computer Science [cs]/Robotics [cs.RO], Nonlinear buckling, 0210 nano-technology, business
Abstract: Compliant mechanisms (CMs) are used to transfer motion, force, and energy, taking advantages of the elastic deformation of the involved compliant members. A branch of special type of elastic phenomenon called (post) buckling has been widely considered in CMs: avoiding buckling for better payload-bearing capacity and utilizing post-buckling to produce multi-stable states. This paper digs into the essence of beam’s buckling and post-buckling behaviors where we start from the famous Euler–Bernoulli beam theory and then extend the mentioned linear theory into geometrically nonlinear one to handle multi-mode buckling problems via introducing the concept of bifurcation theory. Five representative beam buckling cases are studied in this paper, followed by detailed theoretical investigations of their post-buckling behaviors where the multi-state property has been proved. We finally propose a novel type of bi-stable mechanisms termed as pre-buckled bi-stable mechanisms (PBMs) that integrate the features of both rigid and compliant mechanisms. The theoretical insights of PBMs are presented in detail. To the best of our knowledge, this paper is the first study on the theoretical derivation of the kinematic models of PBMs, which could be an important contribution to this field.
Published: 2021

49. Self-assembled polypyrrole nanotubes/MoS2 quantum dots for high performance solid state flexible symmetric supercapacitors

Author: Rabah Boukherroub, Vandana Molahalli, Devendrappa Hundekal, Vijeth Hebri, Ashokkumar Shankar Pawar, Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), NanoBioInterfaces - IEMN (NBI - IEMN), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Mangalore University, The authors acknowledge the Centre for Nanoscience and Engineering (CeNSE), Indian Institute of Science (IISC), Bangalore, for providing the FESEM and HRTEM facilities and also acknowledge the Mangalore University for the research fellowship to carry out the research work., and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: Supercapacitor, [PHYS]Physics [physics], Nanotube, Nanocomposite, Materials science, Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Polypyrrole, 7. Clean energy, 01 natural sciences, Energy storage, 0104 chemical sciences, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], Fuel Technology, Chemical engineering, chemistry, Polymerization, Quantum dot, 0210 nano-technology, Porosity
Abstract: International audience; A new kind of chitosan-polypyrrole nanotube/molybdenum disulphide (CS-PNT/MoS2) nanocomposite is fabricated for the first time via a facile two-step in situ chemical polymerization and hydrothermal method, and successfully applied in flexible charge storage supercapacitor (SC) devices. The CS-PNT/MoS2 nanocomposite represents a good SC electrode material by inheriting the properties of good electrical conductivity of MoS2 and enhanced pseudocapacitive activity of polypyrrole nanotubes (PNTs). The incorporation of chitosan (CS) increases the cycling stability of the CS-PNT/MoS2 nanocomposite by reducing the aggregation of MoS2 quantum dots and enhancing the surface area and porous structure of the nanocomposite, which facilitates the diffusion of the solvent and faradaic process. The CS-PNT/MoS2 nanocomposite exhibits a highest specific capacity (C-sp) of 759 C g(-1) and a solid state flexible symmetric supercapacitor (SSC) was assembled using CS-PNTs/MoS2, which achieved a high-power density of 7680 W kg(-1) at an energy density of 32.12 W h kg(-1) and also good cycling stability with a capacity retention of 91.2% after 10 000 cycles at 10 A g(-1). Remarkably, the SSC device showed enhanced flexibility and stability and can retain up to 97% of its initial capacity under various bending positions, clearly suggesting that the fabricated solid-state SSC device is exceptionally flexible and can be deformed without compromising its structural integrity and energy storage ability. These findings suggest that CS-PNTs/MoS2 represents a promising electrode material for flexible supercapacitors.
Published: 2021

50. Fabricating Silicon Resonators for Analysing Biological Samples: [Review]

Author: Momoko Kumemura, Deniz Pekin, Vivek Menon, Isabelle Van Seuningen, Dominique Collard, Mehmet Tarhan, The University of Tokyo (UTokyo), Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Gunma University, Cancer Heterogeneity, Plasticity and Resistance to Therapies - UMR 9020 - U 1277 (CANTHER), Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille)-Centre National de la Recherche Scientifique (CNRS), Laboratory for Integrated Micro Mechatronics Systems (LIMMS), The University of Tokyo (UTokyo)-Centre National de la Recherche Scientifique (CNRS), Bio-Micro-Electro-Mechanical Systems - IEMN (BIOMEMS - IEMN), Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 (IEMN), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA), Université catholique de Lille (UCL)-Université catholique de Lille (UCL), JUNIA (JUNIA), Université catholique de Lille (UCL), This work was supported by the JSPS Core-to-Core Program (grant number: JPJSCCA20190006) (M.K.) and benefited from 'Contrat de Plan Etat Région' CPER Cancer 2015-2020 (I.V.S., D.C., D.P., M.C.T.). D.P. acknowledges Métropole Européenne de Lille, Inserm, and CNRS, and M.C.T. acknowledges I-SITE ULNE., and Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Université Polytechnique Hauts-de-France (UPHF)-JUNIA (JUNIA)
Subjects: 0303 health sciences, Mechanical Engineering, silicon, 02 engineering and technology, Review, fabrication, resonators, 021001 nanoscience & nanotechnology, 3. Good health, [SPI]Engineering Sciences [physics], 03 medical and health sciences, Control and Systems Engineering, biological applications, TJ1-1570, microelectromechanical systems, Mechanical engineering and machinery, Electrical and Electronic Engineering, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, 0210 nano-technology, 030304 developmental biology
Abstract: International audience; The adaptability of microscale devices allows microtechnologies to be used for a wide range of applications. Biology and medicine are among those fields that, in recent decades, have applied microtechnologies to achieve new and improved functionality. However, despite their ability to achieve assay sensitivities that rival or exceed conventional standards, silicon-based microelectromechanical systems remain underutilised for biological and biomedical applications. Although microelectromechanical resonators and actuators do not always exhibit optimal performance in liquid due to electrical double layer formation and high damping, these issues have been solved with some innovative fabrication processes or alternative experimental approaches. This paper focuses on several examples of silicon-based resonating devices with a brief look at their fundamental sensing elements and key fabrication steps, as well as current and potential biological/biomedical applications.
Published: 2021

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