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1. Superior Semicircular Canal Dehiscence by Superior Petrosal Sinus: Proposal for Classification

Author: Eugen Ionescu, Pierre Reynard, Aurélie Coudert, Lucian Roiban, Aïcha Ltaief Boudrigua, and Hung Thai-Van
Subjects: Otorhinolaryngology, RF1-547
Published: 2021
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2. Multimodal Biosensing on Paper-Based Platform Fabricated by Plasmonic Calligraphy Using Gold Nanobypiramids Ink

Author: Andreea Campu, Laurentiu Susu, Filip Orzan, Dana Maniu, Ana Maria Craciun, Adriana Vulpoi, Lucian Roiban, Monica Focsan, and Simion Astilean
Subjects: biodetection, plasmonic paper, nanoplatform, LSPR, SERS, MEF, Chemistry, QD1-999
Abstract: In this work, we design new plasmonic paper-based nanoplatforms with interesting capabilities in terms of sensitivity, efficiency, and reproducibility for promoting multimodal biodetection via Localized Surface Plasmon Resonance (LSPR), Surface Enhanced Raman Spectroscopy (SERS), and Metal Enhanced Fluorescence (MEF). To succeed, we exploit the unique optical properties of gold nanobipyramids (AuBPs) deposited onto the cellulose fibers via plasmonic calligraphy using a commercial pen. The first step of the biosensing protocol was to precisely graft the previously chemically-formed p-aminothiophenol@Biotin system, as active recognition element for target streptavidin detection, onto the plasmonic nanoplatform. The specific capture of the target protein was successfully demonstrated using three complementary sensing techniques. As a result, while the LSPR based sensing capabilities of the nanoplatform were proved by successive 13–18 nm red shifts of the longitudinal LSPR associated with the change of the surface RI after each step. By employing the ultrasensitive SERS technique, we were able to indirectly confirm the molecular identification of the biotin-streptavidin interaction due to the protein fingerprint bands assigned to amide I, amide III, and Trp vibrations. Additionally, the formed biotin-streptavidin complex acted as a spacer to ensure an optimal distance between the AuBP surface and the Alexa 680 fluorophore for achieving a 2-fold fluorescence emission enhancement of streptavidin@Alexa 680 on the biotinylated nanoplatform compared to the same complex on bare paper (near the plasmonic lines), implementing thus a novel MEF sensing nanoplatform. Finally, by integrating multiple LSPR, SERS, and MEF nanosensors with multiplex capability into a single flexible and portable plasmonic nanoplatform, we could overcome important limits in the field of portable point-of-care diagnostics.
Published: 2019
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3. Pd Nanoparticles/Au@SiO2 Core–Shell Nanostructures for Hydrogen Sensing

Author: Cynthia Cibaka-Ndaya, Nicolas Javahiraly, Lucian Roiban, Thierry Epicier, Nacer Boubiche, Sábastien Valette, Antoine Saury, and Arnaud Brioude
Subjects: General Materials Science
Published: 2023
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4. Study of Single Gold Nanocrystals by Inelastic Light Scattering Spectroscopy

Author: Mariana M. Timm, Lucien Saviot, Aurélien Crut, Nicholas Blanchard, Lucian Roiban, Karine Masenelli-Varlot, Lucile Joly-Pottuz, and Jérémie Margueritat
Subjects: General Energy, Physical and Theoretical Chemistry, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Published: 2022
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5. Study of Molecular-Level Dispersion of Pristine Graphene in Aqueous Media via Polyvinyl Alcohol Coil Physisorption

Author: Ying Huo, Yun Long, Sheng Yuan, Bérangère Toury, Bernard Normand, Clémentine Fellah, Lucian Roiban, and Stéphane Benayoun
Subjects: Electrochemistry, General Materials Science, Surfaces and Interfaces, Condensed Matter Physics, Spectroscopy
Abstract: Graphene has been widely used as a nanofiller in advanced electronic devices and nanocomposite materials to achieve enhanced electronic, mechanical, and barrier properties. Adequate polymers play the role of the composite matrix and can assist in the liquid-phase exfoliation of pristine graphene without any heavy chemical modification and the detriment of the properties of graphene. This stabilization mechanism is generally attributed to the steric forces formed between the polymer-adsorbed adsorbent. However, the key influence of the polymer concentration on the maximum graphene content in the colloidal solutions is still unclear. In this study, three different molar weights of water-soluble polyvinyl alcohol (PVA) were used for graphene dispersion. The influence of the PVA concentration on the graphene dispersion was systematically studied. Based on Flory's theory, we first proposed a model to describe the polymer adsorption process in the graphene/PVA/water ternary system in the "dilute" regime and simulated the adsorption-free energy changes during this transformation. This model is in good agreement with the experimental results and explains the critical polymer concentration
Published: 2022

6. Structural and optical characterization of nanoalloys mixing gold or silver with aluminium or indium: evolution under various reactive environments

Author: Élise Camus, Michel Pellarin, Nicholas Blanchard, Olivier Boisron, Matthias Hillenkamp, Lucian Roiban, Pascal Andreazza, and Emmanuel Cottancin
Subjects: Physical and Theoretical Chemistry
Abstract: The atomic and chemical structure and the optical response of AxB1−x bimetallic nanoparticles (BNPs) combining gold or silver (A) with aluminium or indium (B) were investigated at various stoichiometries.
Published: 2022

7. Superior Semicircular Canal Dehiscence by Superior Petrosal Sinus: Proposal for Classification

Author: P. Reynard, Lucian Roiban, Aurélie Coudert, H. Thai-Van, Aïcha Ltaief Boudrigua, E. Ionescu, Hôpital Edouard Herriot [CHU - HCL], Hospices Civils de Lyon (HCL), Hôpital Femme Mère Enfant [CHU - HCL] (HFME), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), and Université de Lyon
Subjects: medicine.medical_specialty, Semicircular Canal Dehiscence, education, Computed tomography, Dehiscence, [SPI.MAT]Engineering Sciences [physics]/Materials, Daily practice, otorhinolaryngologic diseases, medicine, Humans, In patient, Retrospective Studies, medicine.diagnostic_test, Semicircular canal, business.industry, Magnetic resonance imaging, General Medicine, lcsh:Otorhinolaryngology, lcsh:RF1-547, Semicircular Canals, medicine.anatomical_structure, Otorhinolaryngology, Superior petrosal sinus, Original Article, Vestibule, Labyrinth, sense organs, Radiology, business
Abstract: Objectives This study aimed to present 3 different clinical stages in patients presenting with superior semicircular canal dehiscence (SSCD) by the superior petrosal sinus (SPS). A specific 3-class classification based on clinical, radiological, and audio-vestibular arguments is proposed. Materials and methods We retrospectively compared clinical and radiological findings in 3 patients with different degrees of audio-vestibular dysfunction in whom the imagery evocated the diagnosis of SSCD by SPS. Imaging sensitivity was improved by combining inner ear high-resolution computed tomography (HRCT) scan and magnetic resonance imaging in fusion, allowing us to compare and corroborate clinical and audio-vestibular findings in each case with the imagery. Results HRCT and 3T inner ear fusion imaging highlighted a direct contact and/or compression between SPS and the membranous superior semicircular canal (SSC). We propose a new classification of SSCD by SPS. Class "A" corresponds to an HRCT image with a "cookie bite" and thin bone still covering the SSC. Class "B" corresponds to a "cookie bite" image with confirmed contact between the SPS wall and the membranous SSC in MRI labyrinthine sequences. Class "C" type corresponds to a "cookie bite" image, contact, and obvious compression of the membranous SSC by SPS on MRI sequences. Conclusion Anatomical systematization is needed for daily practice. This classification of SSCD by SPS would contribute to a better understanding of the wide variety and variability in the occurrence and onset of symptoms.
Published: 2021
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8. Proposal for a complete 3D surface reconstruction using images from a scanning electron microscope (SEM)

Author: Mayra Yucely Beb, Sounkalo Dembélé, Akkiz Bekel, Isabelle Jouffroy-Bapicot, Sébastien Thibaud, Nadine Piat, Olivier Lehmann, Jean-Yves Rauch, Patrick Rougeot, Louis-Marie Lebas, Cyril Langlois, Lucian Roiban, Clémentine Fellah, Gilles Cuny, and Karine Masenelli-Varlot
Abstract: A three-dimensional model enables the development of accurate solutions to have more information about the thickness, texture, and characteristics of small-size samples for education and metrology applications. This project proposes an idea to obtain a complete 3D surface reconstruction using the application of Pollen 3D for the scanning electron microscope (SEM) images with high magnification. The main objective is to have a set of images of the complete 360° rotation of the sample with a robot inside the chamber of the SEM. Simulation SEM images with Blender (open source application) are proposed for results validation.
Published: 2022
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9. Morphology and topology assessment in hierarchical zeolite materials: adsorption hysteresis, scanning behavior, and domain theory

Author: Céline Pagis, David Laprune, Lucian Roiban, Thierry Epicier, Cécile Daniel, Alain Tuel, David Farrusseng, and Benoit Coasne
Subjects: Inorganic Chemistry
Abstract: The multiscale porosity of hierarchical zeolite materials is analyzed through advanced adsorption-based characterization in conjunction with additional techniques including electron tomography.
Published: 2022
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10. Development of a bio-inspired angular acceleration sensor : towards the non-invasive investigation of inner ear pathologies

Author: Etienne Puyoo, Laurent Gremillard, Lucian Roiban, Alice Vieren, E. Ionescu, Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)
Subjects: Vestibular system, Physics, inner ear, Angular acceleration, Semicircular canal, Acoustics, vestibular system, Non invasive, Transduction (psychology), flexible sensor, bio-inspired angular acceleration sensor, Pulse (physics), medicine.anatomical_structure, medicine, piezoresistive cantilever, Inner ear, Development (differential geometry), [SDV.IB]Life Sciences [q-bio]/Bioengineering
Abstract: International audience; In this paper, we introduce the development of a bio-inspired system that mimics the angular acceleration sensor function provided by the vestibular system. The prototype is made of a Plexiglas piece that presents the pattern of a semicircular canal at scale 10, with a simplified geometry. A flexible piezoresistive cantilever integrated on polyimide substrate is used to model the electro-mechanical transduction of the cupula/hair cells system. The electro-mechanical response of the complete system is analyzed when submitted to both pulse and sine rotational excitations. It is demonstrated that the biomimetic system only responds to one rotational axis, and is also sensitive to the rotational direction. We also validate that the prototype actually responds to the expected medium vestibular frequencies (from 0.16Hz to 0.64Hz).
Published: 2021
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11. In situ observation of nanoparticle exsolution from Perovskite oxides

Author: Dragos Neagu, Mimoun Aouine, Ian S. Metcalfe, Philippe Vernoux, Chenyang Tang, Mihalis N. Tsampas, Kalliopi Kousi, Mauritius C. M. van de Sanden, Ingeborg Schreur-Piet, Ioan Lucian Roiban, A. Caravaca, V. Kyriakou, Materials and Interface Chemistry, Plasma & Materials Processing, Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Nanostructure, Materials science, Oxide, perovskites, General Physics and Astronomy, Nanoparticle, Nanotechnology, 02 engineering and technology, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Atomic units, nanostructuring, chemistry.chemical_compound, in situ exsolution, Environmental Transmission Electron Microscope, environmental transmission electron microscopy, [CHIM]Chemical Sciences, Energy transformation, General Materials Science, ComputingMilieux_MISCELLANEOUS, TP155, Perovskite (structure), General Engineering, Heterojunction, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, nanoparticles, 0210 nano-technology
Abstract: Understanding and controlling the formation of nanoparticles at the surface of functional oxide supports is critical for tuning activity and stability for catalytic and energy conversion applications. Here, we use a latest generation environmental transmission electron microscope to follow the exsolution of individual nanoparticles at the surface of perovskite oxides, with ultrahigh spatial and temporal resolution. Qualitative and quantitative analysis of the data reveals the atomic scale processes that underpin the formation of the socketed, strain-inducing interface that confers exsolved particles their exceptional stability and reactivity. This insight also enabled us to discover that the shape of exsolved particles can be controlled by changing the atmosphere in which exsolution is carried out, and additionally, this could also produce intriguing heterostructures consisting of metal-metal oxide coupled nanoparticles. Our results not only provide insight into the in situ formation of nanoparticles but also demonstrate the tailoring of nanostructures and nanointerfaces. ©
Published: 2019
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12. Morphological changes of silica aged under environmental conditions by three-dimensional nanoscale quantifications

Author: Guilhem P. Baeza, Karine Masenelli-Varlot, Jacques Jestin, Geneviève Foray, Lucian Roiban, Bernard Yrieix, Bruno Chal, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Institut Laue-Langevin (ILL), ILL, Matériaux et Mécanique des Composants (EDF R&D MMC), EDF R&D (EDF R&D), and EDF (EDF)-EDF (EDF)
Subjects: Length scale, Superinsulation, Nanostructure, Materials science, Renewable Energy, Sustainability and the Environment, Nanotechnology, 02 engineering and technology, General Chemistry, Energy consumption, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 7. Clean energy, 0104 chemical sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, Thermal conductivity, Electron tomography, Natural rubber, visual_art, visual_art.visual_art_medium, General Materials Science, 0210 nano-technology, Nanoscopic scale
Abstract: In recent decades, nanostructured silica has become a key component in several materials developed at the industrial length scale. Used for its outstanding ability to structure food, drugs, and rubber, to fulfil specific needs in numerous applications, it has also led to the widespread development of sustainable energy-based materials. Superinsulation materials endowed with an exceptionally low thermal conductivity are a major goal regarding energy consumption and carbon dioxide emission. However, because the properties of insulation materials greatly depend on their nanostructures, it is crucial to ensure their hygrothermal stability, by limiting ageing phenomena. Here, we thoroughly characterize the hygrothermal ageing of a fractal industrially relevant silica using a complementary set of experimental techniques, providing local (TEM and electron tomography) and statistical indicators of structural evolution. For the first time, we unambiguously evidence the smoothing of elementary particles and quantify their growth (from 4.3 to 10.0 nm), which results in the densification of aggregates at the upper length scale.
Published: 2021
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13. In-situ annealing transmission electron microscopy of plasmonic thin films composed of bimetallic Au-Ag nanoparticles dispersed in a TiO2 matrix

Author: Joel Nuno Pinto Borges, Thierry Epicier, Eduardo Alves, Diogo Emanuel Carvalho Costa, Marcos Rodrigues, N.P. Barradas, Mimoun Aouine, Philippe Steyer, Lucian Roiban, Filipe Vaz, IRCELYON-Microscopie (MICROSCOPIE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and IRCELYON-Méthodologies En Microscopie Environnementale (MEME)
Subjects: Materials science, Annealing (metallurgy), Nanoparticle, 02 engineering and technology, Thermal treatment, [CHIM.CATA]Chemical Sciences/Catalysis, Sputter deposition, 010402 general chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, [SDE.ES]Environmental Sciences/Environmental and Society, 0104 chemical sciences, Surfaces, Coatings and Films, Chemical engineering, Transmission electron microscopy, Thin film, 0210 nano-technology, Instrumentation, Bimetallic strip, Localized surface plasmon
Abstract: This work was focused on the characterization of plasmonic thin films composed of Au–Ag nanoparticles dispersed in a TiO2 dielectric matrix in comparison with the monometallic Au/TiO2 plasmonic system. The thin films were prepared by reactive DC magnetron sputtering, followed by thermal annealing at different temperatures to promote nanoparticles' growth. Thermal treatment from 400 °C induced the appearance of Localized Surface Plasmon Resonances (LSPRs) in both Au/TiO2 and Au–Ag/TiO2 thin films. The latter showed a wider LSPR response, due to the broader size distribution of nanoparticles (analyzed by transmission electron microscopy, TEM). Further nanometer-scale chemical analysis allowed to confirm the presence of Au–Ag bimetallic nanoparticles. To thoroughly study the influence of the annealing treatment on the nanoparticles' growth, Au–Ag/TiO2 was also deposited on heating TEM nano-chips for in-situ annealing experiments. The formation of silver aggregates was found in the sample as-deposited, with these precipitates dissolving in the matrix with the increase of annealing temperature up to 200 °C. For higher temperatures, nanoparticles’ real-time growth was observed, together with the crystallization of the TiO2 matrix above 550 °C. Besides, the plasmonic Au–Ag/TiO2 thin films revealed LSPR sensitivity when in contact with different dielectric media, highlighting their potential as refractive index sensors.
Published: 2021
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14. Real-time high-temperature scanning indentation: Probing physical changes in thin-film metallic glasses

Author: Lucian Roiban, Philippe Steyer, Guillaume Kermouche, Gabrielle Tiphéne, Gaylord Guillonneau, Jean-François Pierson, A. Borroto, Jean-Luc Loubet, Solène Comby-Dassonneville, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne-Centre National de la Recherche Scientifique (CNRS), Laboratoire Georges Friedel (LGF-ENSMSE), École des Mines de Saint-Étienne (Mines Saint-Étienne MSE), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Institut Jean Lamour (IJL), and Université de Lorraine (UL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 010302 applied physics, Materials science, Amorphous metal, 02 engineering and technology, Nanoindentation, 021001 nanoscience & nanotechnology, 01 natural sciences, Amorphous solid, law.invention, [SPI.MAT]Engineering Sciences [physics]/Materials, Differential scanning calorimetry, law, Indentation, 0103 physical sciences, General Materials Science, Thin film, Composite material, Crystallization, 0210 nano-technology, Supercooling
Abstract: This work reports the use of a new high-temperature scanning indentation (HTSI) technique to monitor the physical changes occurring in thin-film metallic glasses (TFMGs) in situ during heat treatment at the local scale. Using this technique, based on high-speed nanoindentation performed during thermal cycles, the entire mechanical evolution with temperature of a binary model ZrCu TFMG was characterized in only a few hours. This approach enabled clear identification of the physical evolutions of the amorphous coatings in only one indentation experiment, highlighting in particular the metallic glass-to-supercooled liquid transition and crystallization process. In addition, the brittle-to-ductile transition was precisely characterized, with remarkable agreement with the literature. Moreover, the mechanical response of the ZrCu thin film was assessed in situ throughout the entire supercooled liquid stage, providing key kinetic information. Nanohardness measurements also enabled the crystallization fraction to be computed over time during the crystallization process. In addition, differential scanning calorimetry and high-temperature X-ray diffraction were performed for comparison purposes, with excellent agreement with the HTSI results. Through this model out-of-equilibrium thin-film study, both the efficiency and robustness of HTSI were demonstrated, providing a better understanding of the thermally activated mechanisms of small-scale systems.
Published: 2021
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15. Manganese oxidation states repartition in a channel‑like mesoporous zirconium oxide

Author: Nelly Couzon, Clémentine Fellah, Leostan Cristian, Fernand Chassagneux, Rodica Chiriac, Francois Toche, Brioude, A., Ioan-Ovidiu Ersen, Khrouz, L., Lucian Roiban, Bois, L., Laboratoire des Multimatériaux et Interfaces (LMI), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Lyon (ENS Lyon), National Institute for Research and Development of Isotopic and Molecular Technologies (INCDTIM), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA)-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), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-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 Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Université de Strasbourg (UNISTRA), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract: International audience; Here, we present a mesoporous mixed manganese zirconium oxide (MnZr) synthesized by evaporation induced self-assembly (EISA) method involving a block copolymer self-assembly method. The MnZr oxide has been fully characterized by X-ray diffraction, transmission electronic microscopy, analytical electronic tomography, nitrogen adsorption/desorption isotherms, thermogravimetric analysis, X-ray photoelectron spectroscopy and electronic paramagnetic resonance. Electronic tomography analysis reveals that a mesoporous solid solution MnZr was successfully obtained by this way, with a homogeneous dispersion of Mn. X-ray diffraction, X-ray photoelectron spectroscopy, thermal analysis and electronic paramagnetic resonance inform about the manganese oxidation states present (II, III and IV) and their location within the sample.
Published: 2020

16. Electron Tomography of Plasmonic Au Nanoparticles Dispersed in a TiO2 Dielectric Matrix

Author: Nicolas Martin, Filipe Vaz, Siddardha Koneti, Lucian Roiban, Thierry Epicier, Joel Nuno Pinto Borges, Marcos Rodrigues, Philippe Steyer, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Departamento de Física [Minho] (DFUM), Universidade do Minho, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and ANR-05-PADD-0003,TRANS,Transformations de l'élevage et dynamiques des espaces(2005)
Subjects: Materials science, Ciências Naturais::Ciências Físicas, Thin films, Ciências Físicas [Ciências Naturais], Nanoparticle, TiO matrix 2, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Reactive magnetron sputtering, [SPI.MAT]Engineering Sciences [physics]/Materials, law.invention, law, Sputtering, STEM (scanning transmission electron microscopy), General Materials Science, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Thin film, Surface plasmon resonance, Plasmon, [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], Science & Technology, business.industry, Localized surface plasmon resonance, 021001 nanoscience & nanotechnology, TiO2 matrix, 0104 chemical sciences, 3. Good health, Electron tomography, Transmission electron microscopy, Optoelectronics, Electron microscope, Au nanoparticles, 0210 nano-technology, business
Abstract: Plasmonic Au nanoparticles (AuNPs) embedded into a TiO2 dielectric matrix were analyzed by combining two-dimensional and three-dimensional electron microscopy techniques. The preparation method was reactive magnetron sputtering, followed by thermal annealing treatments at 400 and 600 degrees C. The goal was to assess the nanostructural characteristics and correlate them with the optical properties of the AuNPs, particularly the localized surface plasmon resonance (LSPR) behavior. High-angle annular dark field scanning transmission electron microscopy results showed the presence of small-sized AuNPs (quantum size regime) in the as-deposited Au-TiO2 film, resulting in a negligible LSPR response. The in-vacuum thermal annealing at 400 degrees C induced the formation of intermediate-sized nanoparticles (NPs), in the range of 10-40 nm, which led to the appearance of a well-defined LSPR band, positioned at 636 nm. Electron tomography revealed that most of the NPs are small-sized and are embedded into the TiO2 matrix, whereas the larger NPs are located at the surface. Annealing at 600 degrees C promotes a bimodal size distribution with intermediate-sized NPs embedded in the matrix and big sized NPs, up to 100 nm, appearing at the surface. The latter are responsible for a broadening and a redshift, to 645 nm, in the LSPR band because of increase of scattering-to-absorption ratio. Beyond differentiating and quantifying the surface and embedded NPs, electron tomography also provided the identification of "hot-spots". The presence of NPs at the surface, individual or in dimers, permits adsorption sites for LSPR sensing and for surface-enhanced spectroscopies, such as surface enhanced Raman scattering., The authors thank the METSA network (FR3507 CNRS) for the financial support for this work, the Clym consortium for granting access to the Jeol 2010F and TITAN 80-300 keV ETEM. S.K. thanks the French Ministry of Higher Education and Research for the financial support during his PhD which was also supported by the LABEX iMUST (ANR-10-LABX-0064) of Universite de Lyon, within the program "Investissements d'Avenir" (ANR-11-IDEX-0007) operated by the French National Research Agency (ANR). This research was partly supported by the 3Dclean ANR-15-CE09-0009 project granted by the ANR. This research was also sponsored by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UID/FIS/04650/2013 and FCT Project 9471-RIDTI, co-funded by FEDER and with reference PTDC/FIS-NAN/1154/2014. J.B. acknowledges FCT for his Postdoc Grant (SFRH/BPD/117010/2016) and M.S.R. acknowledges FCT for his PhD Grant (SFRH/BD/118684/2016)., info:eu-repo/semantics/publishedVersion
Published: 2018
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17. Structural and optical properties of silver-indium and silver-aluminium nanoalloys: stability against oxidation

Author: Élise Camus, Julien Ramade, Michel Pellarin, Nicholas Blanchard, Matthias Hillenkamp, Cyril Langlois, Lucian Roiban, and Emmanuel Cottancin
Subjects: Condensed Matter Physics, Instrumentation, Electronic, Optical and Magnetic Materials
Abstract: Bimetallic nanoparticles (BNPs) are promising candidates for fundamental research and applications, as their physico-chemical properties can, in many cases, be tuned continuously, or enhanced with respect to the mono-metallic particles. Here we investigate the possibility of fabricating silver-indium and silver-aluminium BNPs in the range of 4–5 nm diameter and of varying stoichiometry by laser vaporization and gas condensation in the gas phase. We analyse their crystalline structure and segregation behaviour using transmission electron microscopy and probe their oxidation state in optical absorption measurements by tracking spectral changes of the localized surface plasmon resonance (LSPR). These complementary techniques show that, despite the small size and the high reactivity especially of aluminium, the BNPs form a silver-rich alloyed core surrounded by an oxide shell. Exposure to air leads to consecutive oxidation, whereas annealing the BNPs in a reducing atmosphere stabilizes the alloyed particle cores, as demonstrated by a narrow and blue-shifted LSPR. This is a first step towards the stabilization of non-oxidized bimetallic nanoparticles combining a noble and a trivalent metal.
Published: 2022
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18. Fast ‘Operando ’ electron nanotomography

Author: Lucian Roiban, Alain Tuel, Thierry Epicier, S. Li, David Farrusseng, and Mimoun Aouine
Subjects: chemistry.chemical_classification, Histology, Materials science, Nanotechnology, 02 engineering and technology, Electron, Polymer, 010402 general chemistry, 021001 nanoscience & nanotechnology, Heterogeneous catalysis, 01 natural sciences, Silver nanoparticle, 0104 chemical sciences, Pathology and Forensic Medicine, law.invention, Electron tomography, chemistry, law, Transmission electron microscopy, Calcination, 0210 nano-technology, Nanoscopic scale
Abstract: Electron tomography in transmission electron microscopy provides valuable three-dimensional structural, morphological and chemical information of condensed matter at nanoscale. Current image acquisitions require at least tens of minutes, which prohibits the analysis of nano-objects evolving rapidly such as under dynamic environmental conditions. Reducing the acquisition duration to tens of seconds or less permits to follow in 3D the same object during its evolution under varying temperatures and pressures. We report Operando Electron nanotomography using image series acquired in less than 230 seconds instead of typically 15 min in the best cases so far. The in situ calcination of silica zeolites encaging silver nanoparticles, a catalytic nanosystem of potential interest for, e.g., nuclear waste treatments or selective heterogeneous catalysis, was successfully studied. Kinetic environmental Operando 3D electron microscopy becomes possible, as well as real time observation of beam sensitive samples (polymers, biological objects) without prior preparation, which reduces their contrast and reactivity.
Published: 2017
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19. Highly ductile amorphous oxide at room temperature and high strain rate

Author: Janne Kalikka, Erkki Levänen, Thierry Epicier, Lucile Joly-Pottuz, Lucian Roiban, Fabio Di Fonzo, Mikko Hokka, Douglas Stauffer, Siddardha Koneti, Megan J. Cordill, Matteo Vanazzi, Erkka Frankberg, Jaakko Akola, Francisco García Ferré, Patrice Kreiml, Thierry Douillard, Turkka Salminen, Karine Masenelli-Varlot, Bérangère Le Saint, Jouko Hintikka, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Laboratory of Photonics, University of Tampere [Finland], Tampere University of Technology [Tampere] (TUT), Bruker Nano, Physics Department, Norwegian University of Science and Technology, Norwegian University of Science and Technology [Trondheim] (NTNU), Norwegian University of Science and Technology (NTNU)-Norwegian University of Science and Technology (NTNU), Center for Nano Science and Technology@PoliMi, Instituto Italiano di Tecnologia, Consortium Lyon Saint-Etienne de Microscopie (CLYM), École normale supérieure - Lyon (ENS Lyon)-École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM), Tampere University, Materials Science and Environmental Engineering, Physics, Research group: Nanophotonics, École normale supérieure de Lyon (ENS de Lyon)-École Centrale de Lyon (ECL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)
Subjects: Materials science, aluminium oxide, Oxide, 02 engineering and technology, Flow stress, 01 natural sciences, chemistry.chemical_compound, [SPI]Engineering Sciences [physics], Brittleness, 0103 physical sciences, Composite material, Ductility, ComputingMilieux_MISCELLANEOUS, glass, 010302 applied physics, Multidisciplinary, 218 Environmental engineering, 221 Nanotechnology, ductile, food and beverages, 021001 nanoscience & nanotechnology, Amorphous solid, Creep, chemistry, 216 Materials engineering, Fracture (geology), room temperature, Elongation, 0210 nano-technology
Abstract: A glass that won't break Oxide glasses are important for applications ranging from smartphone screens to window panes. One familiar feature of glass is that it fractures and shatters when rapidly deformed, limiting the number of potential uses. However, Frankberg et al. found that they could deform thin films of glassy alumina (Al 2 O 3 ) with high strain rates at room temperature (see the Perspective by Wondraczek). This surprising observation is supported by simulations of the material that show that dense and flawless glassy alumina samples can deform this way. The discovery provides important insight into designing new glasses that might be more fracture resistant. Science , this issue p. 864 ; see also p. 804
Published: 2019
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20. Electroactive Area from Porous Oxide Films Loaded with Silver Nanoparticles: Electrochemical and Electron Tomography Observations

Author: Laurence Bois, Fernand Chassagneux, Nelly Couzon, Lucian Roiban, Arnaud Brioude, Mathieu Maillard, Laboratoire des Multimatériaux et Interfaces (LMI), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Chemical engineering, Electrode, General Materials Science, [CHIM.MATE]Chemical Sciences/Material chemistry, Cyclic voltammetry, Chronoamperometry, Tin oxide, Electrochemistry, Voltammetry, Silver nanoparticle, ComputingMilieux_MISCELLANEOUS, Nanomaterials
Abstract: Electrochemical studies of nanomaterial-based electrodes have been widely developed for catalyst and energy-harvesting applications. The evolution of these electrodes over time and their efficiency have been extensively studied and analyzed in order to optimize their performance. However, the electrochemical responses of electrodes are rarely studied in terms of the position of the active species within these electrodes. In this paper, we highlight that the spatial location of silver nanoparticles (NPs) embedded inside semiconductive porous films, TiO2 or Fe2O3, is crucial for the electrochemical response. In fact, by using cycling voltammetry and electron tomography experiments, we show the existence of an "electroactive area", corresponding to a reduced thickness of the sample in close vicinity to a fluorine-doped tin oxide substrate where most of the electrochemical responses originate. Our results demonstrate that, for a film thickness of several hundred nanometers, only less than 30 nm close to the substrate responds electrochemically. However, cyclic voltammetry empties the electroactive area of silver NPs. Therefore, application of chronoamperometry coupled to irradiation allowed regeneration of this area thanks to an increased diffusion of silver species. In this paper, we also show the significant diffusion of silver species within the film during electrochemical experiments, a phenomenon even increased by irradiation. These results are therefore an important step that shows the importance of the localization of active species within a porous film and help in understanding and increasing the durability of nanomaterial-based electrodes.
Published: 2019
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21. Effect of Chlorine-Containing VOCs on Silver Migration and Sintering in ZSM-5 Used in a TSA Process

Author: Gabriel Couchaux, Vincent Thomas, Antoine Artheix, Luis Cardenas, David Farrusseng, Arnaud Monpezat, Claire Gréau, Sylvain Topin, Ludovic Deliere, Lucian Roiban, Benoit Coasne, IRCELYON-Etudes & analyse de surfaces, XPS, LEIS (XPS), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and IRCELYON-Ingéniérie, du matériau au réacteur (ING)
Subjects: silver nanoparticles, Materials science, Sintering, Nanoparticle, 010402 general chemistry, 010502 geochemistry & geophysics, lcsh:Chemical technology, 01 natural sciences, Catalysis, Silver nanoparticle, Nanomaterials, lcsh:Chemistry, Silver chloride, chemistry.chemical_compound, Adsorption, lcsh:TP1-1185, Physical and Theoretical Chemistry, zeolite, 0105 earth and related environmental sciences, sintering, [CHIM.CATA]Chemical Sciences/Catalysis, [SDE.ES]Environmental Sciences/Environmental and Society, 0104 chemical sciences, poisoning, Chemical engineering, chemistry, lcsh:QD1-999, adsorption, Particle, Dispersion (chemistry)
Abstract: Silver nanoparticles are currently one of the most studied nanostructured nanomaterials. Because nanoparticle size and dispersion act together in determining a material&rsquo, s physical and chemical properties, there is a continuous quest to develop size-controlled synthesis methods. Nonetheless, the instability of the nanometer-sized particles, which is caused by their tendency to aggregate irreversibly into larger particles, remains a recurrent problem. The use of confining scaffolds, such as the regular system of cages in a crystalline zeolite-type material, is often reported in the literature as an efficient solution to overcome particle migration at the surface. Silver nanoparticles encapsulated in ZSM-5 (Ag@ZSM-5) represent a new generation of adsorbent for Xe enrichment from the atmosphere that is currently being developed at the pilot scale in a Temperature Swing Adsorption (TSA) process. In this study, we have found that the presence of Cl-containing compounds in the air (VOCs) leads to a poisoning of the active silver phase by the formation of silver chloride. By a careful study of process parameters, we have found that most of the chlorine can be removed by heat treatment above 573 K so that the adsorption properties of silver are regenerated. That said, when applying 573 K temperature regeneration at the pilot scale, we observe a very minor but observable decay of xenon adsorption capacity that continues cycle after cycle. The mechanism of capacity decay is discussed in terms of (i) the residual presence of Cl at the surface of silver nanoparticles, (ii) the aggregation of silver nanoparticles into larger particles (sintering mechanism), and (iii) the acceleration of silver particle migration to the surface and sintering.
Published: 2019
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22. Fast electron tomography: Applications to beam sensitive samples and in situ TEM or operando environmental TEM studies

Author: Siddardha Koneti, Lucian Roiban, Florent Dalmas, Cyril Langlois, Anne-Sophie Gay, Amandine Cabiac, Thomas Grenier, Hussein Banjak, Voichiţa Maxim, Thierry Epicier, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), IFP Energies nouvelles (IFPEN), Images et Modèles, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Imagerie Tomographique et Radiothérapie, ANR-15-CE09-0009,3DCLEAN,Tri-Dimensionnel Nano-laboratoire catalytique environnemental(2015), ANR-10-LABX-0064,Imust,Institut for Multiscale Science and Technology : from Fundamental Physics and Chemistry to Engineering in New Material and Processes and Ecotechnologies(2010), ANR-11-IDEX-0007,Avenir L.S.E.,PROJET AVENIR LYON SAINT-ETIENNE(2011), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), CCSD, Accord Elsevier, Tri-Dimensionnel Nano-laboratoire catalytique environnemental - - 3DCLEAN2015 - ANR-15-CE09-0009 - AAPG2015 - VALID, Institut for Multiscale Science and Technology : from Fundamental Physics and Chemistry to Engineering in New Material and Processes and Ecotechnologies - - Imust2010 - ANR-10-LABX-0064 - LABX - VALID, and PROJET AVENIR LYON SAINT-ETIENNE - - Avenir L.S.E.2011 - ANR-11-IDEX-0007 - IDEX - VALID
Subjects: Materials science, Polymer nanocomposite, Nanotechnology, 02 engineering and technology, [SPI.MAT] Engineering Sciences [physics]/Materials, 01 natural sciences, Nanomaterials, [SPI.MAT]Engineering Sciences [physics]/Materials, Data acquisition, Environmental Transmission Electron Microscope, Pd-Al2O3, 0103 physical sciences, Nano, General Materials Science, 010302 applied physics, Tomographic reconstruction, Pd-SiO2, Mechanical Engineering, Environmental Transmission Electron Microscopy (ETEM), 021001 nanoscience & nanotechnology, Condensed Matter Physics, Fast operando Electron Tomography, Tilt (optics), Electron tomography, Mechanics of Materials, 0210 nano-technology, Nanocatalysts
Abstract: International audience; Electron Tomography (ET) is of greatest interest in studying nano- and biological materials since it gives access to 3D morphological, chemical and physical features. Even though ET techniques have been continuously improved in the last decades, they are still limited: lengthy time scales (tens of minutes) are generally needed for the tilt series acquisition prior to the volume reconstruction step. Such long exposures to a relatively intense electron beam lead to large electron doses received by the sample. This may promote extensive irradiation damage in the case of soft materials like polymers and bio-materials when they are not protected through dedicated sample preparation methods, and any tomographic reconstruction will then be meaningless. More importantly, the time constraints drastically limit 3D investigations during dynamic in-situ experiments where the sample rapidly evolves during the acquisition.We present here developments for acquiring tilt series of projections in very short time scales, readily down to a few seconds. After an outlook of possible ways to speed up the data acquisition in the bright field imaging mode (BF-TEM), strategies for the fastest methods in ‘step-by-step’ and ‘continuous tilt’ ET will be described. Applications of these procedures are presented on various systems, including metallic Pd nanoparticles deposited on alumina, and soft materials like polymer nanocomposites and biological matter. A special reference is made to fast operando nano-tomography performed on nanomaterials during their dynamic evolution. The feasibility of fast ET is exemplified by a calcination study of Pd catalysts supported by SiO2 at 400 °C and 500 °C under 4 mbar H2 in a dedicated Environmental Transmission Electron Microscope (ETEM).
Published: 2019
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23. Shape-selective synthesis of nanoceria for degradation of paraoxon as a chemical warfare simulant

Author: Greta Camilla Magnano, Isabelle Trenque, Matthieu Bugnet, Thierry Devers, Isabelle Pitault, Karine Masenelli-Varlot, Frédéric Chaput, Marie-Alexandrine Bolzinger, Lucian Roiban, Stéphanie Briançon, David Amans, Laboratoire d'automatique, de génie des procédés et de génie pharmaceutique (LAGEPP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), Luminescence (LUMINESCENCE), Institut Lumière Matière [Villeurbanne] (ILM), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Chimie - UMR5182 (LC), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université de Lyon-Université de Lyon-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), Consortium Lyon Saint-Etienne de Microscopie (CLYM), École normale supérieure de Lyon (ENS de Lyon)-École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM), IUT de Chartres, Université d'Orléans (UO), Université de Lyon-Université de Lyon-École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Université de Lyon-Université de Lyon-École normale supérieure - Lyon (ENS Lyon)-Institut de Chimie du CNRS (INC), École normale supérieure - Lyon (ENS Lyon)-École Centrale de Lyon (ECL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM)
Subjects: [PHYS]Physics [physics], Cerium oxide, Paraoxon, Chemistry, General Physics and Astronomy, chemistry.chemical_element, Nanoparticle, 02 engineering and technology, [SDV.SP]Life Sciences [q-bio]/Pharmaceutical sciences, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Cerium, Adsorption, [SDV.SP.PG]Life Sciences [q-bio]/Pharmaceutical sciences/Galenic pharmacology, Chemical engineering, Desorption, Specific surface area, medicine, [CHIM]Chemical Sciences, Nanorod, Physical and Theoretical Chemistry, 0210 nano-technology, medicine.drug
Abstract: International audience; Repeated attacks using organophosphorus compounds, in military conflicts or terrorist acts, necessitate developing inexpensive and readily available decontamination systems. Nanosized cerium oxide is a suitable candidate, acting as a heterogeneous catalyst for the degradation of organophosphorus compounds such as VX agent or sarin. However, the reaction mechanism of the phosphatase mimetic activity of CeO2 nanoparticles is not fully described. Adsorption, surface-promoted hydrolysis, and desorption cycles strongly depend on the physico-chemical characteristics of the facets. In this study, CeO2 nanoparticles with different shapes were elaborated by hydrothermal synthesis. Nano-octahedra, nanocubes, or nanorods were selectively obtained under different conditions (temperature, concentration and nature of the precursors). The degradation activity according to the crystal faces was evaluated in vitro by measuring the degradation kinetics of paraoxon organophosphate in the presence of CeO2 nanoparticles. The results show an influence of both specific surface area and crystal faces of the nanoparticles, with higher activity for {111} facets compared to {100} facets at 32 °C. The relative activity between the facets is ascribed to the adsorption probability, assuming coordination between the phosphoryl oxygen and cerium atoms, but also to the surface density of the Ce doublets with relevant spacing for phosphatase mimetic activity.
Published: 2019
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24. Quantitative Analysis of grafted CNT dispersion and of their stiffening of polyurethane (PU)

Author: Jean Yves Cavaille, Juan Xiao, Gildas Diguet, Lucian Roiban, Laurence Seveyrat, Laurent Lebrun, D. S. Dhungana, M.H. Jomaa, Karine Masenelli-Varlot, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Laboratoire de Génie Electrique et Ferroélectricité (LGEF), Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), ELyTMaX, École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Tohoku University [Sendai]-Centre National de la Recherche Scientifique (CNRS), and ANR-10-INTB-0910,NAPOLECO,Polymères chargés nanotubes pour la conversion d'énergie(2010)
Subjects: Materials science, Composite number, 02 engineering and technology, Carbon nanotube, mechanical properties, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Tortuosity, law.invention, [SPI]Engineering Sciences [physics], law, medicine, Composite material, Mechanical energy, polymers, Electrostriction, carbon nanotubes, Energy conversion efficiency, General Engineering, Stiffness, 021001 nanoscience & nanotechnology, Microstructure, 0104 chemical sciences, scanning/transmission electron microscopy (STEM), smart materials, Ceramics and Composites, medicine.symptom, 0210 nano-technology
Abstract: International audience; Electroactive devices are developed for energy conversion purposes. In particular, polyurethanes (PU) are lightweight and flexible materials, which have demonstrated their ability to convert electrical energy into mechanical energy (actuation by electrostriction) and vice-versa (energy harvesting). It has been shown that energy conversion efficiency can be increased by incorporating carbon nanotubes (CNTs) into a PU matrix. The counterpart of this 2 improvement is the stiffness increase, which in turn limits the electrostriction efficiency. On the other hand, it is well known that CNTs are hardly dispersed in a polymeric matrix, and that the interfacial adhesion strength is generally poor. One solution to improve both dispersion and adhesion consists in grafting polymeric chains onto the CNT surfaces. As most of the works dedicated to improve material electroactivity are mainly empirical, this work aims to (i) better characterize these material microstructures by electron tomography, through the measurement of the CNT tortuosity, the CNT-CNT minimum distance and the number of their contacts, and (ii) and to predict their mechanical stiffness from these microstructural data. From electron microscopy observations of the studied materials, CNTs can be assumed to be composed of successive stiff rods of measured length and orientation, linked together by flexible kinks. Their mechanical stiffening effect in PU is, simply and in an original way, evaluated using the classical analytical equations derived by Halpin and Kardos, accounting for the microstructural parameters determined by electron tomography. It appears clearly that, due to their tortuosity and despite their ultra-high longitudinal stiffness, CNTs only poorly stiffen soft matrices. Fully stretching 10 m long nanotubes increases the composite modulus by almost 10 for a fraction of only 2 vol.%.
Published: 2019
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25. Electron tomography on latex particles suspended in water using Environmental Scanning Electron Microscopy

Author: Lucian Roiban, Geneviève Foray, Karine Masenelli-Varlot, X. Jiao, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Fourier shell correlation, polymer, Composite number, electron tomography, General Physics and Astronomy, 02 engineering and technology, 01 natural sciences, Suspension (chemistry), [SPI]Engineering Sciences [physics], Structural Biology, 0103 physical sciences, General Materials Science, liquid, Composite material, Image resolution, Environmental scanning electron microscope, 010302 applied physics, chemistry.chemical_classification, Cell Biology, Polymer, STEM, 021001 nanoscience & nanotechnology, ESEM, Electron tomography, chemistry, Tomography, 0210 nano-technology
Abstract: International audience; Tilted image series are acquired on liquid suspensions of latex particles supported by a carbon membrane. To do so, a home-made stage fitting in an Environmental Scanning Electron Microscope (ESEM) is optimized in order to minimize cold losses and therefore improve both sample stability and spatial resolution in the images. As latex particles are electron-sensitive materials, sample degradation and stability are taken into account in the choice of the parameters for tilted image series acquisition. Despite the limited number of images, conventional algorithms are used to reconstruct the volume and study the three-dimensional arrangement of latex particles. The lattice types are in good agreement with what can be observed on frozen suspensions, although the domain sizes are smaller. Several quantitative parameters such as the latex particle size and the distance to the first neighbors are extracted from the 3D model. Finally, the spatial resolution in the tomograms is estimated using the Crowther's criterion and Fourier Shell Correlation analysis. It is also measured directly by analyzing a suspension containing latex particles and a surfactant of interest for composite formulation.
Published: 2019
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26. Correction to: Manganese oxidation states repartition in a channel-like mesoporous zirconium oxide

Author: Rodica Chiriac, Nelly Couzon, Arnaud Brioude, Fernand Chassagneux, François Toche, Clémentine Fellah, Cristian Leostean, Laurence Bois, Lucian Roiban, Ovidiu Ersen, and Lhoussain Khrouz
Subjects: Materials science, Mechanical Engineering, chemistry.chemical_element, 02 engineering and technology, Manganese, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Crystallography, chemistry, Mechanics of Materials, Correct name, Zirconium oxide, General Materials Science, Channel (broadcasting), 0210 nano-technology, Mesoporous material, Author name
Abstract: In the original publication the author name ''Cristian Leostean'' has been incorrectly displayed as ''Cristian Loestean". The correct name of the author is ''Cristian Leostean".
Published: 2021
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27. 2D & 3D in situ study of the calcination of Pd nanocatalysts supported on delta-Alumina in an Environmental Transmission Electron Microscope

Author: Thierry Epicier, Siddardha Koneti, Priscilla Avenier, Amandine Cabiac, Anne-Sophie Gay, Lucian Roiban, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), IFP Energies nouvelles (IFPEN), ANR-15-CE09-0009,3DCLEAN,Tri-Dimensionnel Nano-laboratoire catalytique environnemental(2015), and ANR-10-LABX-0064,Imust,Institut for Multiscale Science and Technology : from Fundamental Physics and Chemistry to Engineering in New Material and Processes and Ecotechnologies(2010)
Subjects: Ostwald ripening, Microscope, Materials science, Ultra-high vacuum, Nanotechnology, 02 engineering and technology, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, Nanomaterial-based catalyst, 0104 chemical sciences, law.invention, symbols.namesake, Electron tomography, law, Transmission electron microscopy, Environmental Transmission Electron Microscope, symbols, Calcination, 0210 nano-technology
Abstract: International audience; The quality of metallic nanoparticles (NPs) used in heterogeneous catalysis relies through many aspects on their small size, on the homogeneity of their spatial distribution on their supports and on their ability to resist to sintering or coalescence. It is thus very important to quantify these parameters and understand the mechanisms controlling the growth of NPs during the genesis process of the catalyst. Whereas conventional Transmission Electron Microscopy (TEM) is currently used for these purposes, it most frequently remains a ‘static’ method where results are obtained in high vacuum and post mortem, i.e. after the typical drying, calcination and reduction steps without the possibility to follow directly the evolution of both NPs and supports during those treatments. Environmental TEM (ETEM) unlocks this blocking and allows elementary mechanisms, such as Ostwald Ripening and coalescence to be unravelled through direct in situ observations. We report here an ETEM study of the preparation of Pd-based narrow NPs, less than 5 nm in size, deposited on a δ-alumina support. We focused on 3 main objectives: (i) quantifying the sizes of NPs at each preparation step performed in situ under environmental (i.e. respectively oxygen or air and hydrogen atmospheres at working temperatures) and comparing them to post mortem measurements; (ii) identify the oxidation state of the NPs through an in situ High Resolution imaging study of their crystallographic structure; (iii) explore the possibilities of environmental tri-dimensional (3D) studies by tilt series based Electron Tomography. This last item represents a challenging breakthrough in the characterization of nanocatalysts; it will be demonstrated that the use of modern instruments (microscope and accessories) allows tomographic acquisitions to be performed very fast, within a few minutes and even seconds, which opens the way to the 3D tracking of microstructures almost in real time during their evolution under gas and at high temperature.
Published: 2019
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28. Nanostructured silica used in super-insulation materials (SIM), hygrothermal ageing followed by sorption characterizations

Author: Bernard Yrieix, Geneviève Foray, Karine Masenelli-Varlot, Lucian Roiban, Bruno Chal, Jean-Marc Chenal, EDF R&D (EDF R&D), EDF (EDF), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Sorption measurements, Materials science, 020209 energy, Hydrophobicity, 0211 other engineering and technologies, Specific surface area, 02 engineering and technology, Durability, [SPI.MAT]Engineering Sciences [physics]/Materials, Precipitated silicas, Adsorption, 021105 building & construction, Dissolution/precipitation, 0202 electrical engineering, electronic engineering, information engineering, Structural evolution, Relative humidity, Mass transfer, Electrical and Electronic Engineering, Dissolution, Hydrophilicity, Civil and Structural Engineering, Hydrophobic silica, Fumed silica, Precipitated silica, Mechanical Engineering, Aerogels, Sorption, Silica, Building and Construction, Size distribution, Influence of humidity, Surface chemistry, Ageing, Chemical engineering, Superinsulation, 13. Climate action, Pore size, Nanostructured silica
Abstract: cited By 4; Several commercial silica powders (precipitated, fumed, hydrophobized) and aerogels were aged in climatic chambers. Four different conditions of temperature [50–70 °C] and relative humidity [70–90%RH] were used to identify the influence of both parameters and the underlying mechanisms. Samples were characterized by sorption measurements (nitrogen and water) giving access to the evolution of specific surface area (BET), pore size distribution (BJH) and hydrophilicity. Structurally, a common trend along with silica ageing is the reduction of the specific surface area and a shift in the pore size distribution (loss of the smallest mesopores). However, the ageing scenario and intensities observed differ according to the type of silica (precipitated, fumed, hydrophobic, aerogels). On the one hand, the hydrophilicity of a precipitated silica decreases with ageing due to the reduction of the specific surface area. On the other hand, the hydrophilicity of a fumed silica first increases then decreases with ageing, as a result of two competing effects: the increase of local hydrophilicity (siloxane hydrolysis) and the decrease of the specific surface area. Surface chemistry appears to be a key parameter governing the extent of these evolutions: a precipitated silica is more sensitive than a fumed silica whereas the hydrophobic silica studied exhibited the strongest resistance. Therefore, the main mechanism of structural evolution, probably implying mass transfer in a dissolution/precipitation process, requires water on the surface of silica and thus hydrophilic groups to adsorb it. Short term ageing (24 days) on precipitated and fumed silicas showed that temperature is the most important parameter in activating a mechanism, the intensity of which is thereafter (96 days) governed by relative humidity. The significant influence of humidity was also observed for aerogels, for which the ageing scenario and intensity appears to be product specific. © 2018 Elsevier B.V.
Published: 2019
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29. Multiscale structure of super insulation nano-fumed silicas studied by SAXS, tomography and porosimetry

Author: Christian Olagnon, Bruno Chal, Lucian Roiban, Geneviève Foray, Guilhem P. Baeza, Belynda Benane, Bernard Yrieix, Sylvain Meille, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), EDF R&D (EDF R&D), and EDF (EDF)
Subjects: Aggregates, Materials science, Electric impedance tomography, Polymers and Plastics, Mercury intrusion porosimetry, X ray scattering, Low thermal conductivity, High resolution transmission electron microscopy, 02 engineering and technology, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, Thermal conductivity, 0103 physical sciences, Nano, Low dimensionality, Composite material, Tomography, Fumed silica, 010302 applied physics, Scattering, Small-angle X-ray scattering, Metals and Alloys, Silica, Porosimetry, SAXS, FRactal aggregate, 021001 nanoscience & nanotechnology, Electronic, Optical and Magnetic Materials, Electron tomography, Transmission electron microscopy, Insulation, Coremaking, Ceramics and Composites, Multi-scale structures, 0210 nano-technology, Curse of dimensionality, Nanostructured silica
Abstract: cited By 2; We focus on describing the multi-scale structure of a fumed silica characterized by remarkably low thermal conductivity (ca. 2–5 mW m −1 K −1 ) when used as a core material in vacuum insulating panels. While such powders are known to be highly polydisperse at different lengthscales (hardly quantifiable), we propose to adapt a recent methodology based on small-angle X-ray scattering experiments with the aim of providing simple criteria for characterizing the morphology of these nanostructured silicas. Combining this technique with transmission electron microscopy, electron-tomography and mercury intrusion porosimetry then allows assigning the origin of the super-insulation to the low dimensionality of the silica aggregates at lengthscales smaller than 500 nm. Remarkably, by using independently these three techniques, we always find the compacity of the aggregates (radius of ca. 40 nm) to be equal to 0.29 ± 0.01. This study proposes therefore a robust methodology, potentially of a great interest for industrial applications. © 2019 Acta Materialia Inc.
Published: 2019
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30. Electron Tomography of Plasmonic Au Nanoparticles Dispersed in a TiO

Author: Siddardha, Koneti, Joel, Borges, Lucian, Roiban, Marco S, Rodrigues, Nicolas, Martin, Thierry, Epicier, Filipe, Vaz, and Philippe, Steyer
Abstract: Plasmonic Au nanoparticles (AuNPs) embedded into a TiO
Published: 2018

31. PEALD of Pt nanoparticles: towards the development of single electron transistors and flexible strain sensors

Author: Etienne Puyoo, Daniel Thomas, Martine LE BERRE, Liviu Militaru, Christophe Malhaire, Siddardha Koneti, Solène Brottet, Rémi Rafael, Matthieu Bugnet, Annie Malchere, Thierry Epicier, Lucian Roiban, INL - Dispositifs Electroniques (INL - DE), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), INL - Plateforme Technologique Nanolyon (INL - Nanolyon), Consortium Lyon Saint-Etienne de Microscopie (CLYM), École normale supérieure - Lyon (ENS Lyon)-École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM), LE BERRE, Martine, École Centrale de Lyon (ECL), 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)-École Centrale de Lyon (ECL), École normale supérieure de Lyon (ENS de Lyon)-École Centrale de Lyon (ECL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)
Subjects: [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2018

32. Very Fast Tomography in the (E)TEM to Probe Dynamics in Materials during Operando and In Situ Experiments

Author: Thierry Epicier, Hussein Banjak, Anne-Sophie Gay, Thomas Grenier, Sid Koneti, Voichita Maxim, Lucian Roiban, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Imagerie Tomographique et Radiothérapie, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), IFP Energies nouvelles (IFPEN), Images et Modèles, ANR-15-CE09-0009,3DCLEAN,Tri-Dimensionnel Nano-laboratoire catalytique environnemental(2015), Epicier, Thierry, Tri-Dimensionnel Nano-laboratoire catalytique environnemental - - 3DCLEAN2015 - ANR-15-CE09-0009 - AAPG2015 - VALID, Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 0301 basic medicine, In situ, Materials science, Dynamics (mechanics), 02 engineering and technology, 021001 nanoscience & nanotechnology, [PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], 03 medical and health sciences, 030104 developmental biology, Chemical physics, Environmental TEM, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Tomography, 0210 nano-technology, Instrumentation, Transmission Electron Microscopy TEM, ComputingMilieux_MISCELLANEOUS, Operando TEM
Abstract: International audience
Published: 2018
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33. Uncovering the 3D Structure of Combustion-Synthesized Noble Metal-Ceria Nanocatalysts

Author: Lucian Roiban, Franck Morfin, Thierry Epicier, Pascale Mascunan, Mimoun Aouine, Siddardha Koneti, Laurent Piccolo, Thanh-Son Nguyen, IRCELYON-Ingéniérie, du matériau au réacteur (ING), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-Analyse chimique, texture (ANALYSE), IRCELYON-Microscopie (MICROSCOPIE), IRCELYON-Catalyse Hétérogène pour la Transition Energétique (CATREN), and IRCELYON, ProductionsScientifiques
Subjects: Materials science, Scanning electron microscope, Nanoparticle, Nanotechnology, 02 engineering and technology, engineering.material, 010402 general chemistry, Platinum nanoparticles, Heterogeneous catalysis, 01 natural sciences, Catalysis, Inorganic Chemistry, Scanning transmission electron microscopy, Physical and Theoretical Chemistry, Organic Chemistry, [CHIM.CATA] Chemical Sciences/Catalysis, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, [SDE.ES]Environmental Sciences/Environmental and Society, Nanomaterial-based catalyst, 0104 chemical sciences, engineering, Noble metal, [SDE.ES] Environmental Sciences/Environmental and Society, 0210 nano-technology, Mesoporous material
Abstract: ANALYSE:MICROSCOPIE+ECI2D:ING+FMO:PMA:MAO:LPI; International audience; With its unique redox properties, ceria is an oxide with a range of applications, including automotive catalytic converters, which consist of platinum-group metal nanoparticles on ceria-containing supports. In this work, the 3D architecture of a ceria-based material synthesized by the widely employed glycine- nitrate solution combustion method [1,2] is revealed for the first time.Together with N2 adsorption volumetry, scanning transmission electron microscopy (STEM) and scanning electron microscopy (SEM), STEM tomography provides a comprehensive picture of the multimodal porous network of a pre-reduced Pt-CeO2 catalyst, from the nanometer to the micrometer scale. This material consists of ceria nanocrystallites forming 3D aggregates and puzzle-like 2D walls separating large roundish mesopores and macropores. The small voids between imperfectly assembled crystallites give rise to some microporosity. In addition, it is demonstrated that a significant proportion of platinum nanoparticles (3–4 nm) are not located at the ceria surface following the one-step synthesis process, i.e. about half of them are buried within ceria. This result is valid for another metal (Rh) and another fuel (oxalyl dihydrazide), and has important implications for heterogeneous catalysis [3].References[1]A. Varma, A.S. Mukasyan, A.S. Rogachev, K.V. Manukyan, Chemical Reviews 2016, 116, 14496-14586.[2]F. Morfin, T.S. Nguyen, J.L. Rousset, L. Piccolo, Applied Catalysis B: Environmental 2016, 197, 2-13.[3]L. Roiban, S. Koneti, F. Morfin, T.S. Nguyen, P. Mascunan, M. Aouine, T. Epicier, L. Piccolo, ChemCatChem 2017, 9, 4607-4613.
Published: 2018

34. Obtaining 3D Chemical Maps by Energy Filtered Transmission Electron Microscopy Tomography

Author: Charles Hirlimann, Ovidiu Ersen, Lucian Roiban, Loïc Sorbier, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), IFP Energies nouvelles (IFPEN), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), 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, and 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)
Subjects: 0301 basic medicine, Electron Microscope Tomography, Silicon, silica alumina, General Chemical Engineering, Microscopy, Energy-Filtering Transmission Electron, chemistry.chemical_element, 02 engineering and technology, General Biochemistry, Genetics and Molecular Biology, 03 medical and health sciences, Imaging, Three-Dimensional, Optics, 3D chemical mapping, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, Aluminium, Microscopy, catalyst support, Energy filtered transmission electron microscopy, Sample preparation, ComputingMilieux_MISCELLANEOUS, General Immunology and Microbiology, business.industry, General Neuroscience, 021001 nanoscience & nanotechnology, Chemistry, titania alumina, 030104 developmental biology, chemistry, analytical tomography, EFTEM tomography, Cathode ray, Tomography, 0210 nano-technology, business, Beam (structure)
Abstract: Energy filtered transmission electron microscopy tomography (EFTEM tomography) can provide three-dimensional (3D) chemical maps of materials at a nanometric scale. EFTEM tomography can separate chemical elements that are very difficult to distinguish using other imaging techniques. The experimental protocol described here shows how to create 3D chemical maps to understand the chemical distribution and morphology of a material. Sample preparation steps for data segmentation are presented. This protocol permits the 3D distribution analysis of chemical elements in a nanometric sample. However, it should be noted that currently, the 3D chemical maps can only be generated for samples that are not beam sensitive, since the recording of filtered images requires long exposure times to an intense electron beam. The protocol was applied to quantify the chemical distribution of the components of two different heterogeneous catalyst supports. In the first study, the chemical distribution of aluminum and titanium in titania-alumina supports was analyzed. The samples were prepared using the swing-pH method. In the second, the chemical distribution of aluminum and silicon in silica-alumina supports that were prepared using the sol-powder and mechanical mixture methods was examined.
Published: 2018
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35. Evaluation of noise and blur effects with SIRT-FISTA-TV reconstruction algorithm: Application to fast environmental transmission electron tomography

Author: Hussein Banjak, Thomas Grenier, Thierry Epicier, Siddardha Koneti, Lucian Roiban, Anne-Sophie Gay, Isabelle Magnin, Françoise Peyrin, Voichita Maxim, Imagerie Tomographique et Radiothérapie, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet [Saint-Étienne] (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Images et Modèles, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), IFP Energies nouvelles (IFPEN), Imagerie et modélisation Vasculaires, Thoraciques et Cérébrales (MOTIVATE), European Synchrotron Radiation Facility (ESRF), ANR-15-CE09-0009,3DCLEAN,Tri-Dimensionnel Nano-laboratoire catalytique environnemental(2015), ANR-11-IDEX-0007,Avenir L.S.E.,PROJET AVENIR LYON SAINT-ETIENNE(2011), ANR-11-LABX-0063,PRIMES,Physique, Radiobiologie, Imagerie Médicale et Simulation(2011), 4 - Imagerie Tomographique et Radiothérapie, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé ( CREATIS ), Hospices Civils de Lyon ( HCL ) -Université Jean Monnet [Saint-Étienne] ( UJM ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Hospices Civils de Lyon ( HCL ) -Université Jean Monnet [Saint-Étienne] ( UJM ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Centre National de la Recherche Scientifique ( CNRS ) -Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ), 2 - Images et Modèles, Matériaux, ingénierie et science [Villeurbanne] ( MATEIS ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ) -Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), IFP Energies nouvelles ( IFPEN ), 1 - Imagerie et modélisation Vasculaires, Thoraciques et Cérébrales ( MOTIVATE ), and European Synchrotron Radiation Facility ( ESRF )
Subjects: [ INFO.INFO-TS ] Computer Science [cs]/Signal and Image Processing, Computer science, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, 02 engineering and technology, Iterative reconstruction, 01 natural sciences, Poor quality, [INFO.INFO-TS]Computer Science [cs]/Signal and Image Processing, Robustness (computer science), Environmental TEM, Fast acquisition, 0103 physical sciences, [INFO.INFO-IM]Computer Science [cs]/Medical Imaging, Computer vision, Segmentation, Instrumentation, Tilt series, 010302 applied physics, [ INFO.INFO-IM ] Computer Science [cs]/Medical Imaging, business.industry, Reconstruction algorithm, 021001 nanoscience & nanotechnology, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Electron tomography, Artificial intelligence, Tomography, 0210 nano-technology, business, Nanocatalysts
Abstract: International audience; Highlights The proposed SIRT-FISTA-TV algorithm is adapted to tomography reconstruction from tilt series of images such as recorded in Transmission Electron Microscopy. It produces reconstructed volumes with clear and sharp edges, and thus, the segmentation step was quite easy to perform after 3D reconstruction.SIRT-FISTA-TV can suppress noise artifacts without affecting spatial resolution.SIRT-FISTA-TV is robust to blurred data and gives better results than conventional reconstruction algorithms.SIRT-FISTA-TV is very well adapted to 3D reconstruction of experimental data (i.e. tilt series of projections) collected during very rapid tilt series acquisitions (down to 5 seconds) in situ or operando environmental TEM for studying dynamics of nanomaterials such as nanocatalysts.Fast tomography in Environmental Transmission Electron Microscopy (ETEM) is of a great interest for in situ experiments where it allows to observe 3D real-time evolution of nanomaterials under operating conditions. In this context, we are working on speeding up the acquisition step to a few seconds mainly with applications on nanocatalysts. In order to accomplish such rapid acquisitions of the required tilt series of projections, a modern 4K high-speed camera is used, that can capture up to 100 images per second in a 2K binning mode. However, due to the fast rotation of the sample during the tilt procedure, noise and blur effects may occur in many projections which in turn would lead to poor quality reconstructions. Blurred projections make classical reconstruction algorithms inappropriate and require the use of prior information. In this work, a regularized algebraic reconstruction algorithm named SIRT-FISTA-TV is proposed. The performance of this algorithm using blurred data is studied by means of a numerical blur introduced into simulated images series to mimic possible mechanical instabilities/drifts during fast acquisitions. We also present reconstruction results from noisy data to show the robustness of the algorithm to noise. Finally, we show reconstructions with experimental datasets and we demonstrate the interest of fast tomography with an ultra-fast acquisition performed under environmental conditions, i.e. gas and temperature, in the ETEM. Compared to classically used SIRT and SART approaches, our proposed SIRT-FISTA-TV reconstruction algorithm provides higher quality tomograms allowing easier segmentation of the reconstructed volume for a better final processing and analysis.
Published: 2018
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36. Electron Tomography of Plasmonic Au Nanoparticles Dispersed in a TiO2 Dielectric Matrix

Author: Borges, Joel, Martin, Nicolas, Rodrigues, Marco Sampaio, Thierry, Epicier, Vaz, Filipe, Steyer, P, Siddardha, Koneti, Lucian, Roiban, Departamento de Física [Minho] (DFUM), Universidade do Minho, Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), and Universidade do Minho (Centro de Física)
Subjects: [SPI.ACOU]Engineering Sciences [physics]/Acoustics [physics.class-ph], [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience; Plasmonic Au nanoparticles (AuNPs) embedded into a TiO2 dielectric matrix were analyzed by combining two-dimensional and three-dimensional electron microscopy techniques. The preparation method was reactive magnetron sputtering, followed by thermal annealing treatments at 400 and 600 °C. The goal was to assess the nanostructural characteristics and correlate them with the optical properties of the AuNPs, particularly the localized surface plasmon resonance (LSPR) behavior. High-angle annular dark ﬁeldscanning transmission electron microscopy results showed the presence of small-sized AuNPs (quantum size regime) in the as-deposited Au−TiO2 ﬁlm, resulting in a negligible LSPR response. The in-vacuum thermal annealing at 400 °C induced the formation of intermediate-sized nanoparticles (NPs), in the range of 10−40 nm, which led to the appearance of a well-deﬁned LSPR band, positioned at 636 nm. Electron tomography revealed that most of the NPs are small-sized and are embedded into the TiO2 matrix, whereas the larger NPs are located at the surface. Annealing at 600 °C promotes a bimodal size distribution with intermediate-sized NPs embedded in the matrix and bigsized NPs, up to 100 nm, appearing at the surface. The latter are responsible for a broadening and a redshift, to 645 nm, in the LSPR band because of increase of scattering-to-absorption ratio. Beyond diﬀerentiating and quantifying the surface and embedded NPs, electron tomography also provided the identiﬁcation of “hot-spots”. The presence of NPs at the surface, individual or in dimers, permits adsorption sites for LSPR sensing and for surface-enhanced spectroscopies, such as surfaceenhanced Raman scattering.
Published: 2018

37. Sub-Micron Anisotropy in Super Insulation Nano-Fumed Silicas

Author: Sylvain Meille, Guilhem P. Baeza, Christian Olagnon, Belynda Benane, Lucian Roiban, Bernard Yrieix, Geneviève Foray, and Bruno Chal
Subjects: Thermal conductivity, Materials science, Electron tomography, Scattering, Small-angle X-ray scattering, Transmission electron microscopy, Nano, Nanotechnology, Anisotropy, Fumed silica
Abstract: It is well accepted that global energy transition will be strongly dependent on energy saving. Here, we focus on describing the multi-scale structure of a fumed silica characterized by remarkably low thermal conductivity (ca. 2-5 mW.m-1.K-1) when used as a core material in vacuum insulating panels. While such powders are known to be highly polydisperse at different lengthscales (hardly quantifiable), we propose an original methodology based on small-angle X-ray scattering experiments with the aim of providing simple criteria for characterizing the morphology of these nanostructured silicas. Combining this technique with transmission electron microscopy, electron-tomography and mercury intrusion porosimetry also allow assigning the origin of the super-insulation to the pronounced and graduated anisotropy of the silica aggregates at lengthscales smaller than 500 nm. This result shows the need for nanometric structure tailoring and provides the basis for designing new synthesis routes scalable at the industrial level.
Published: 2018
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38. Durability of silica aerogels dedicated to superinsulation measured under hygrothermal conditions

Author: Geneviève Foray, Jean-Marc Chenal, Bernard Yrieix, Bruno Chal, Lucian Roiban, Karine Masenelli-Varlot, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Matériaux et Mécanique des Composants (EDF R&D MMC), EDF R&D (EDF R&D), and EDF (EDF)-EDF (EDF)
Subjects: Materials science, 020209 energy, Testing, 02 engineering and technology, Hygro-thermal conditions, 7. Clean energy, Precautionary principle, Durability, [SPI.MAT]Engineering Sciences [physics]/Materials, Accelerated ageing tests, Thermal conductivity, Physicochemical property, Specific surface area, Thermal, 0202 electrical engineering, electronic engineering, information engineering, General Materials Science, Composite material, Fluxmeter measurements, Gas emissions, Superinsulation, Energy efficiency in buildings, Commerce, Aerogels, Silica gel, Aerogel, Silica, General Chemistry, Size distribution, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Microstructure, Ageing, Energy efficiency, Greenhouse gases, Silica aerogels, 13. Climate action, Mechanics of Materials, Pore size, 0210 nano-technology, Mesoporous material, Porosity
Abstract: cited By 0; International audience; Energy efficiency in buildings is a crucial lever for lowering greenhouse gas emissions and a mass market for silica aerogel as retrofitting material. Their durability is therefore a major concern. When applying the precautionary principle, industrial companies have difficulties in estimating the service lifetime of innovative materials such as aerogel. Thus, their costs remain high and market penetration low until the durability of the materials they produce is confirmed. In this paper, commercial silica aerogels were exposed to accelerated ageing over long periods. Microstructural evolutions were tracked by nitrogen and water sorption while thermal conductivities were characterized by heat fluxmeter measurements. 96 and 384 days at 70 °C and 90%RH were sufficient to produce noticeable changes in the physico-chemical properties of certain products but almost none in others. The first change observed was an increase of hydrophilicity, followed by a loss of specific surface area, and a shifted and enlarged pore size distribution. The measurements confirmed that microstructure changes induce higher thermal conductivities. Depending on the specific type of aerogel product, the accelerated ageing tests lead to a significant, but limited increase of thermal conductivity of up to 2,5 mW/(m.K). The main hypotheses for explaining this phenomenon are the growth of neck size between two silica particles and the presence of water in the pores. In addition, it is shown for the first time for a wide range of aerogels that pore size distribution and hydrophobization are the key parameters for tuning aerogel durability in severe conditions. Consequently, the mesoporous community has a framework of tests and mechanisms to design aerogels for their specific efficiency/cost/durability requirements. © 2018 Elsevier Inc.
Published: 2018
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39. Hollow Beta Zeolite Single Crystals for the Design of Selective Catalysts

Author: Lucian Roiban, Siddhardha Koneti, David Farrusseng, Thierry Epicier, Ana Rita Morgado Prates, Alain Tuel, Nicolas Bats, Frederic Meunier, Laurence Burel, Céline Pagis, Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), IFP Energies nouvelles (IFPEN), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Chemical substance, Materials science, 010405 organic chemistry, technology, industry, and agriculture, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, law.invention, Catalysis, Crystal, Metal, Chemical engineering, Electron tomography, Magazine, law, visual_art, visual_art.visual_art_medium, General Materials Science, Zeolite, Science, technology and society
Abstract: We present a Pt@Beta catalyst with a unique, well-controlled location of metal nanoparticles that allows more efficient use of this rare, expensive metal in catalysis. The zeolite crystal has an inner cavity, leaving a thin zeolite shell where the metal nanoparticles are encapsulated, thereby ensuring a relatively small diffusional path length and high selectivity. Hollow Beta is obtained by a controlled dissolution–recrystallization method. The location of the particles not only was revealed by electron tomography 3D reconstruction but was further confirmed by a model hydrogenation reaction of aromatics.
Published: 2018
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40. Investigation of the in-plane and out-of-plane electrical properties of metallic nanoparticles in dielectric matrix thin films elaborated by atomic layer deposition

Author: Daniel Thomas, Lucian Roiban, A Malchère, L. Militaru, Etienne Puyoo, M. Le Berre, David Albertini, Thierry Epicier, Siddardha Koneti, Francis Calmon, Andrei Sabac, INL - Dispositifs Electroniques (INL - DE), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), 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)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), INL - Plateforme Technologique Nanolyon (INL - Nanolyon), and ANR-11-IDEX-0007,Avenir L.S.E.,PROJET AVENIR LYON SAINT-ETIENNE(2011)
Subjects: Electron mobility, Materials science, Analytical chemistry, Bioengineering, 02 engineering and technology, 01 natural sciences, Atomic layer deposition, Planar, 0103 physical sciences, General Materials Science, Electrical and Electronic Engineering, Thin film, 010302 applied physics, metallic nanoparticles, Condensed matter physics, Mechanical Engineering, [SPI.NRJ]Engineering Sciences [physics]/Electric power, shadow edge evaporation, General Chemistry, 021001 nanoscience & nanotechnology, Evaporation (deposition), Mechanics of Materials, atomic layer deposition, electrical properties, Electrode, 0210 nano-technology, Current density, Order of magnitude
Abstract: International audience; Pt nanoparticles in a Al2O3 dielectric matrix thin films are elaborated by means of atomic layer deposition. These nanostructured thin films are integrated in vertical and planar test structures in order to assess both their in-plane and out-of-plane electrical properties. A shadow edge evaporation process is used to develop planar devices with electrode separation distances in the range of 30 nm. Both vertical and planar test structures show a Poole–Frenkel conduction mechanism. Low trap energy levels (
Published: 2017
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41. Three-Dimensional Analytical Surface Quantification of Heterogeneous Silica-Alumina Catalyst Supports

Author: Ovidiu Ersen, Marc Drillon, Charles Hirlimann, Laurent Lemaitre, Lucian Roiban, Alexandra Chaumonnot, Loïc Sorbier, Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), 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), and IFP Energies nouvelles (IFPEN)
Subjects: Boehmite, Materials science, Silicon, Analytical chemistry, chemistry.chemical_element, scanning probe microscopy, 02 engineering and technology, Thermal treatment, 010402 general chemistry, 01 natural sciences, Catalysis, Inorganic Chemistry, Specific surface area, [CHIM]Chemical Sciences, Physical and Theoretical Chemistry, Fourier transform infrared spectroscopy, supported catalysts, acidity, Precipitation (chemistry), Organic Chemistry, silicon, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Amorphous solid, chemistry, Transmission electron microscopy, aluminum, 0210 nano-technology
Abstract: International audience; The ability of energy-filtered transmission electron microscopy (EFTEM) tomography to provide 3D chemical maps at the nanoscale opens a new way to analyse heterogeneous materials quantitatively. In association with other techniques, EFTEM tomography has been employed in the study of amorphous silica-alumina catalyst supports. Two types of samples prepared either by mechanical mixing (MM) or by the precipitation of silica on boehmite (PSB) that have similar proportions of silica and alumina were analysed. The sample synthesised by the PSB method shows a smaller degree of heterogeneity than the sample obtained by MM. For both types of samples, a higher concentration of alumina was found at the surface, whereas silica mostly constituted the core of the sample. A thermal treatment in a humid atmosphere was shown to redistribute the silica inside the sample as well as on its surface, which decreased the specific surface area at the same time. The acid sites localisation was defined as a specific curve at the interface between the two components upon reaching the surface of the support. The length of this curve, the “alumina–silica boundary line”, was estimated by using EFTEM tomography and discussed qualitatively with the chemical inter-mixing information deduced from additional techniques such as FTIR and NMR spectroscopy.
Published: 2017
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42. Thermal evolution of silver nanoparticles onto porous TiO 2 nanostructures

Author: Ovidiu Ersen, Dumitru Georgescu, Lucian Baia, Simona Moldovan, Lucian Roiban, Groupe de physique des matériaux (GPM), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-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)-Institut de Recherche sur les Matériaux Avancés (IRMA), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), 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)-Université de Caen Normandie (UNICAEN), Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), 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), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Faculty of Physics, University Babes-Bolya, Faculty of Physics, Centre National de la Recherche Scientifique (CNRS)-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)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), 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, and 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)
Subjects: Ostwald ripening, Nanostructure, Chemistry, Composite number, technology, industry, and agriculture, Nanotechnology, 02 engineering and technology, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Catalysis, Silver nanoparticle, 0104 chemical sciences, Crystallinity, symbols.namesake, Electron tomography, Transmission electron microscopy, Photocatalysis, symbols, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS
Abstract: The evolution of composite systems constituted by Ag nanoparticles (NPs) deposited onto TiO2 supports under thermal constraints is reported here. The experimental approach advanced combines different working modes and methodologies available in a transmission electron microscope (TEM), i.e. in-situ TEM and electron tomography as carried out on the very same object. The results clearly show the role of the temperature, and the environment on the ratio of encapsulated Ag NPs and on both the morphology and crystallinity of the TiO2 support. Apart from the morphology changes, this study stands as a fundamental investigation of the mechanisms of NPs coarsening particularly by Ostwald ripening. This type of behaviour can be definitely associated to the morphology changes induced by a photocatalytic reactions commonly carried out on TiO2 supports.
Published: 2017
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43. Local Plasmonic Studies on Individual Core–Shell Gold–Silver and Pure Gold Nano-Bipyramids

Author: Mona Tréguer-Delapierre, Lucian Roiban, Raul Arenal, Ovidiu Ersen, Julien Burgin, Luc Henrard, Laboratorio de microscopias avanzadas (LMA), University of Zaragoza - Universidad de Zaragoza [Zaragoza], Fundacion ARAID, Department of Physics [Namur], Université de Namur [Namur] (UNamur), Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS), 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), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Laboratoire Ondes et Matière d'Aquitaine (LOMA), Université de Bordeaux (UB)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Européen COST MP0901-NanoTP
Subjects: Materials science, Resolution (electron density), Shell (structure), Physics::Optics, Nanoparticle, Nanotechnology, [CHIM.MATE]Chemical Sciences/Material chemistry, Discrete dipole approximation, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, General Energy, Scanning transmission electron microscopy, Nano, Physics::Atomic and Molecular Clusters, Physical and Theoretical Chemistry, Plasmon, Localized surface plasmon
Abstract: Bimetallic systems present new opportunities to tailor the optical properties of nanoparticles. Morphology, structural, and optical properties of gold and of gold-silver nanoparticles have been studied by three-dimensional (3D) scanning transmission electron microscopy (STEM), STEM imaging, and monochromated subnanometer electron beams. The 3D morphology of these nanoparticles consists of bipyramidal prisms with well-defined facets. Furthermore, in the case of the core-shell nanoparticles, from these tomographical studies, we have determined the silver (shell) distribution and their atomic arrangement. Multipolar localized surface plasmon resonances (LSPR) have been studied, at subnanometer level and at high-energy resolution, as a function of their shape, their size (aspect ratio), and the surrounding environment. These results have been interpreted in the framework of the discrete dipole approximation (DDA) simulations. The effect of the silver outer-shell has been elucidated. We observed a significant damping of plasmon excitations due to the difference of dielectric function of these two metals. In addition, we have shown that the combination of the tomographical and plasmonic (experiments and simulations) studies with such high spatial resolution constitutes a very powerful and fundamental tool for understanding and optimizing the photonics properties of nanomaterials. (Graph Presented).
Published: 2014
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44. Characterization of Liquid Suspensions in 3D using Environmental Scanning Electron Microscopy in Transmission

Author: Karine Masenelli-Varlot, Juan Xiao, Geneviève Foray, and Lucian Roiban
Subjects: 010302 applied physics, Materials science, business.industry, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Characterization (materials science), Transmission (telecommunications), 0103 physical sciences, Optoelectronics, 0210 nano-technology, business, Instrumentation, Environmental scanning electron microscope
Published: 2018
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45. Flexible Platinum Nanoparticle-based Piezoresistive Transducers Elaborated by Atomic Layer Deposition

Author: Etienne Puyoo, Christophe Malhaire, Daniel Thomas, Rémi Rafael, Mili, Mohamed R., Annie Malchere, Lucian Roiban, Koneti, S., Matthieu Bugnet, Andrei SABAC, Martine Le Berre, INL - Dispositifs Electroniques (INL - DE), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), STI-IMM-LEG, Ecole Polytechnique Fédérale de Lausanne (EPFL), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-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), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), 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)-École Centrale de Lyon (ECL), and Inl, Laboratoire INL UMR5270
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [PHYS] Physics [physics], [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: 15-18 june 2017; International audience; no abstract
Published: 2017

46. Pt nanoislands embedded in Al2O3 matrix: from ALD-based fabrication to structural to electrical characterization

Author: Daniel Thomas, Etienne Puyoo, Martine Le Berre, Liviu Militaru, Koneti, S., Annie Malchere, Lucian Roiban, Andrei SABAC, David Albertini, Bruno Canut, Francis Calmon, Brice Gautier, STI-IMM-LEG, Ecole Polytechnique Fédérale de Lausanne (EPFL), INL - Dispositifs Electroniques (INL - DE), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), 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)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), INL - Plateforme Technologique Nanolyon (INL - Nanolyon), INL - Spectroscopies et Nanomatériaux (INL - S&N), and Inl, Laboratoire INL UMR5270
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [PHYS] Physics [physics], [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: 22-26/05/2017; International audience; no abstract
Published: 2017

47. Three dimensional analysis of nanoporous silicon particles for Li-ion batteries

Author: Thierry Epicier, Hidemi Kato, Lucian Roiban, Sergiu Curelea, Francisco J. Cadete Santos Aires, Eric Maire, Siddardha Koneti, Takeshi Wada, Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)
Subjects: Materials science, литий-ионные аккумуляторы, Compaction, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Ion, Physisorption, General Materials Science, Porosity, электронные томографы, Aggregate (composite), Mechanical Engineering, [CHIM.CATA]Chemical Sciences/Catalysis, 021001 nanoscience & nanotechnology, Condensed Matter Physics, трехмерный анализ, [SDE.ES]Environmental Sciences/Environmental and Society, нанопористый кремний, 0104 chemical sciences, Crystallography, Chemical engineering, Electron tomography, Mechanics of Materials, Particle, Nanorod, 0210 nano-technology
Abstract: SSCI-VIDE+EQUIPE-VIDE+TEP; International audience; Bulk nanoporous silicon prepared by top-down method form Li-ion batteries was investigated combining different conventional technique such as nitrogen physisorption and high resolution electron microscopy with electron tomography. It was found that the Si nanorods are forming porous aggregates with a half of the volume of the particle occupied by pores. The nanorods are preferentially oriented along the main axis of the aggregate. The porosity and the lack of compaction between the aggregates provide space for the Si expansion during the lithiation process. It was found that the Si nanorods mainly expose the {111} family plane as an external faces. The size distributions of the porous and solid phases in a granule were found to be similar. The pores represent 50% of the total volume of an aggregate. The shape orientation of the particles was quantified and it was found to exhibit a narrow distribution. (C) 2016 Elsevier Inc. All rights reserved.
Published: 2017
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48. Robocast zirconia-toughened alumina scaffolds: Processing, structural characterisation and interaction with human primary osteoblasts

Author: Christoph M. Sprecher, Lucian Roiban, Laurent Gremillard, Mauro Alini, Marianna Peroglio, Ana-Maria Stanciuc, Jérôme Adrien, Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA), AO Research institute Davos (ARI), AO Foundation, Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), and ADRIEN, Jérôme
Subjects: 010302 applied physics, Scaffold, Materials science, Zirconia Toughened Alumina, 02 engineering and technology, Microporous material, 021001 nanoscience & nanotechnology, 01 natural sciences, [SPI.MECA.MEMA] Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Osseointegration, Hip arthroplasty, visual_art, 0103 physical sciences, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], Materials Chemistry, Ceramics and Composites, visual_art.visual_art_medium, Ceramic, Composite material, 0210 nano-technology, Layer (electronics), ComputingMilieux_MISCELLANEOUS
Abstract: Zirconia-toughened alumina (ZTA) is the gold-standard ceramic in hip arthroplasty, but still lacks direct osseointegration and a metal shell, often coated with a bioactive layer, is currently required. The latter could potentially be replaced by a thinner, architectured ZTA layer, thereby allowing for larger acetabular components, with larger range of motion and lower dislocation risk. Robocasting may be an adequate technique to fabricate the architectured layer. Therefore, as a first step, this study aimed to produce ZTA scaffolds (3D-ZTA) by robocasting and assess their in vitro response. Shape retention was achieved by using a stable, well-dispersed, high solid loading ink injected in acid pH waterbath. 3D-ZTA exhibit regularly spaced microporous, rough struts and fully interconnected macroporosity. Human primary osteoblasts were homogenously distributed inside 3D-ZTA and showed increased osteogenic marker expression compared to 2D-ZTA control. Further work will focus on optimizing scaffold design to improve cell retention and extracellular matrix maturation.
Published: 2017

49. Metallic nanoparticle-based strain sensors elaborated by atomic layer deposition

Author: M. Le Berre, Daniel Thomas, Annie Malchere, Matthieu Bugnet, M. R'Mili, C. Malhaire, Siddardha Koneti, Lucian Roiban, Andrei Sabac, Rémi Rafael, Etienne Puyoo, INL - Dispositifs Electroniques ( INL - DE ), Institut des Nanotechnologies de Lyon ( INL ), École Centrale de Lyon ( ECL ), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 ( UCBL ), 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 ) -École Centrale de Lyon ( ECL ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ) -Centre National de la Recherche Scientifique ( CNRS ), Matériaux, ingénierie et science [Villeurbanne] ( MATEIS ), Université Claude Bernard Lyon 1 ( UCBL ), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique ( CNRS ) -Institut National des Sciences Appliquées de Lyon ( INSA Lyon ), Université de Lyon-Institut National des Sciences Appliquées ( INSA ) -Institut National des Sciences Appliquées ( INSA ), INL - Dispositifs Electroniques (INL - DE), Institut des Nanotechnologies de Lyon (INL), Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-École Centrale de Lyon (ECL), Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-École supérieure de Chimie Physique Electronique de Lyon (CPE), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Wheatstone bridge, Physics and Astronomy (miscellaneous), [ SPI.MAT ] Engineering Sciences [physics]/Materials, Nanoparticle, Nanotechnology, 02 engineering and technology, Bending, 01 natural sciences, law.invention, [SPI.MAT]Engineering Sciences [physics]/Materials, Atomic layer deposition, law, 0103 physical sciences, Composite material, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Strain gauge, 010302 applied physics, Physics, [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS ] Physics [physics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], 021001 nanoscience & nanotechnology, Pressure sensor, Gauge factor, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [ SPI.NANO ] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [ SPI.OPTI ] Engineering Sciences [physics]/Optics / Photonic, 0210 nano-technology, Short circuit
Abstract: International audience; Platinum nanoparticle-based strain gauges are elaborated by means of atomic layer deposition on flexible polyimide substrates. Their electro-mechanical response is tested under mechanical bending in both buckling and conformational contact configurations. A maximum gauge factor of 70 is reached at a strain level of 0.5%. Although the exponential dependence of the gauge resistance on strain is attributed to the tunneling effect, it is shown that the majority of the junctions between adjacent Pt nanoparticles are in a short circuit state. Finally, we demonstrate the feasibility of an all-plastic pressure sensor integrating Pt nanoparticle-based strain gauges in a Wheatstone bridge configuration.
Published: 2017
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50. PEALD Platinum Nano-island SET Fabrication and Electrical Characterization

Author: Daniel Thomas, Etienne Puyoo, Le Berre, M., Liviu Militaru, Koneti, S., Annie Malchere, Lucian Roiban, Andrei SABAC, Khaled Ayadi, Céline Chevalier, Joëlle Gregoire, Francis Calmon, Brice Gautier, Inl, Laboratoire INL UMR5270, STI-IMM-LEG, Ecole Polytechnique Fédérale de Lausanne (EPFL), INL - Dispositifs Electroniques (INL - DE), Institut des Nanotechnologies de Lyon (INL), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL), 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)-École Centrale de Lyon (ECL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Matériaux, ingénierie et science [Villeurbanne] (MATEIS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), INL - Plateforme Technologique Nanolyon (INL - Nanolyon), and INL - Photovoltaïque (INL - PV)
Subjects: [PHYS]Physics [physics], [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO] Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, [SPI.MAT] Engineering Sciences [physics]/Materials, [SPI.MAT]Engineering Sciences [physics]/Materials, [PHYS] Physics [physics]
Abstract: 15-18 june 2017; International audience; no abstract
Published: 2017

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