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848 results on '"Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB)"'

1. Revealing the adsorption mechanism of copper on hemp-based materials through EDX, nano-CT, XPS, FTIR, Raman, and XANES characterization techniques

Author: Chiara Mongioví, Grégorio Crini, Xavier Gabrion, Vincent Placet, Virginie Blondeau-Patissier, Anna Krystianiak, Sylvie Durand, Johnny Beaugrand, Angelina Dorlando, Camille Rivard, Landrot Gautier, Ana Rita Lado Ribeiro, Dario Lacalamita, Bernard Martel, Jean-Noël Staelens, Aleksandra Ivanovska, Mirjana Kostić, Olivier Heintz, Corina Bradu, Marina Raschetti, Nadia Morin-Crini, Laboratoire Chrono-environnement (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), 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), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Unité de recherche sur les Biopolymères, Interactions Assemblages (BIA), Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Département Aliments, produits biosourcés et déchets - INRAE (TRANSFORM), Synchrotron SOLEIL (SSOLEIL), Centre National de la Recherche Scientifique (CNRS), Universidade do Porto = University of Porto, Université de Lille, University of Belgrade [Belgrade], University of Bucharest (UniBuc), R ́egion Bourgogne Franche-Comté (France), FEDER (Fonds Europ ́een de Développement Régional), Silac Industrie (Champlitte, France) and Eurochanvre (Arc-les-Gray, France) for financial support (FINEAU Program 2021-2024: an European project focused on 'Plant-Based Cellulosic Materials for Wastewater Treatment').ANR-17-EURE-002, CNRS, INRAE, ENSCL, Laboratoire Chrono-environnement (UMR 6249) [LCE], Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) [FEMTO-ST], Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB], Unité de recherche sur les Biopolymères, Interactions Assemblages [BIA], Synchrotron SOLEIL [SSOLEIL], Département Aliments, produits biosourcés et déchets - INRAE [TRANSFORM], Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia [LSRE-LCM], Unité Matériaux et Transformations (UMET) - UMR 8207, Unité Matériaux et Transformations - UMR 8207 [UMET], and University of Bucharest [UniBuc]
Subjects: [SPI.OTHER]Engineering Sciences [physics]/Other, Hemp shives, Copper, Adsorption, Mechanism, [PHYS.MECA]Physics [physics]/Mechanics [physics], General Medicine
Abstract: International audience; Hemp-based materials have been recently proposed as adsorbents formetals present in aqueous solutions using adsorption-orientedprocesses. This study aims to reveal the adsorption mechanism ofmaterials prepared from hemp shives as co-products of the hempindustry, namely sodium carbonate-activated (SHI-C) andpolycarboxylic agent-grafted (SHI-BTCA) hemp shives. Theinteractions between copper and two hemp-based materials werecharacterized by different microscopic and spectroscopic techniquessuch as energy-disperse
Published: 2022
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2. Selective adsorption of formaldehyde and water vapors in NaY and NaX zeolites

Author: Igor Bezverkhyy, Jean-Pierre Bellat, Jean-François Lamonier, Guy Weber, Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Catalyse et Environnement (LCE), MREI, Université du Littoral Côte d'Opale (ULCO)-Université du Littoral Côte d'Opale (ULCO)-Université du Littoral Côte d'Opale (ULCO), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), ENSCL, CNRS, Centrale Lille, Univ. Artois, Université de Lille, Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB], Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), and Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Inorganic chemistry, water, Formaldehyde, 02 engineering and technology, Calorimetry, 010402 general chemistry, 01 natural sciences, High silica, Adsorption selectivity, Pressure range, chemistry.chemical_compound, Adsorption, Coadsorption, Water, Zeolite, Selectivity, [CHIM]Chemical Sciences, General Materials Science, zeolite, ComputingMilieux_MISCELLANEOUS, Chemistry, coadsorption, selectivity, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 0104 chemical sciences, [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, Mechanics of Materials, Selective adsorption, formaldehyde, 0210 nano-technology
Abstract: International audience; Coadsorption of formaldehyde and water vapors on NaX and NaY zeolites is studied at 298 K in the pressure range 0-2 hPa by manometry coupled with gas phase chromatography and calorimetry. Coadsorption isotherms, adsorption selectivities and coadsorption heats are measured. Results show that the coadsorption process is selective for water at low filling and for formaldehyde at high filling. The adsorption selectivity for formaldehyde over water is however too low to consider the possibility of using such adsorbents for the development of air handling units. On the other hand, a preliminary study carried out on the adsorption of formaldehyde and water in pure gas phase on a hydrophobic FAU zeolite reveals that high silica zeolites could be promising adsorbents for the capture of formaldehyde in the presence of water.
Published: 2019
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3. Raman spectra analysis of ZrO 2 thermally grown on Zircaloy substrates irradiated with heavy ion: Effects of oxygen isotopic substitution

Author: L. Fayette, Frédéric Leprêtre, Sébastien Chevalier, Michel Mermoux, Clément Ciszak, Ioana Popa, Christian Duriez, Gaëlle Gutierrez, Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Matériaux Interfaces ELectrochimie (MIEL ), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Laboratoire de Microscopie et d'Etudes de l'Endommagement (LM2E), Service d'Etudes des Matériaux Irradiés (SEMI), Département des Matériaux pour le Nucléaire (DMN), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département des Matériaux pour le Nucléaire (DMN), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, PSN-RES/SEREX/LE2M, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Expérimentation en Mécanique et Matériaux (IRSN/PSN-RES/SEREX/LE2M), Service d'Etude et de Recherche EXpérimentale (IRSN/PSN-RES/SEREX), Institut de Radioprotection et de Sûreté Nucléaire (IRSN)-Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Commissariat à l'Energie Atomique et aux énergies alternatives - CEA (FRANCE), Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut polytechnique de Grenoble (FRANCE), Institut de Radioprotection et de Sûreté Nucléaire - IRSN (FRANCE), Université Grenoble Alpes - UGA (FRANCE), Université Bourgogne Franche-Comté - UBFC (FRANCE), Université de Savoie Mont Blanc - USMB (FRANCE), and Laboratoire Interdisciplinaire Carnot de Bourgogne - ICB (Dijon, France)
Subjects: Materials science, Analytical chemistry, chemistry.chemical_element, 02 engineering and technology, 01 natural sciences, Oxygen, Fluence, Ion, symbols.namesake, Phase (matter), [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], General Materials Science, Cubic zirconia, Irradiation, Spectroscopy, Irradiation damage, 010401 analytical chemistry, Zirconium alloy, 18O labelling, 021001 nanoscience & nanotechnology, 0104 chemical sciences, chemistry, Ion irradiation, symbols, Zirconia, Mécanique des matériaux, Raman spectra, 0210 nano-technology, Raman spectroscopy
Abstract: International audience; Recently, unusual Raman signals were observed in different works conducted on thin zirconia layers grown on zirconium alloys simulating in‐reactor materials after high fluence ion irradiation or for samples cut from fuel rods irradiated in nuclear plants. As such, these spectra clearly do not correspond to any known spectrum of a pure standard zirconia phase. Therefore, the analysis conducted in this paper aims to provide a better understanding of these peculiar Raman features. For that purpose, specific ion‐irradiated samples were analysed. In situ Raman spectroscopy was first used to follow the irradiation process. Then, samples were characterized using different excitation wavelengths. Finally, the effects of oxygen isotopic substitution were examined in details. Results are discussed in terms of disorder and size‐related effects.
Published: 2019
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4. Removal of Toluene over NaX Zeolite Exchanged with Cu2+

Author: Romero, Douglas, Chlala, Dayan, Labaki, Madona, Royer, Sébastien, Bellat, Jean-Pierre, Bezverkhyy, Igor, Giraudon, Jean-Marc, Lamonier, Jean-François, ENSCL, CNRS, Centrale Lille, Univ. Artois, Université de Lille, Unité de Catalyse et de Chimie du Solide (UCCS) - UMR 8181, Unité de Catalyse et Chimie du Solide - UMR 8181 [UCCS], Laboratoire de Chimie Physique des Matériaux [LCPM], Lebanese University [Beirut] [LU], Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB], Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Lebanese University [Beirut] (LU), Laboratoire de Chimie Physique des Matériaux (LCPM), Université Libanaise, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS)
Subjects: lcsh:Chemistry, lcsh:QD1-999, adsorption, VOC, copper, toluene, lcsh:TP1-1185, [CHIM.CATA]Chemical Sciences/Catalysis, zeolite, lcsh:Chemical technology, catalytic oxidation
Abstract: International audience; Toluene is a major air pollutant emitted from painting and metal coating processes and might have some health effects. Adsorption and catalytic complete oxidation are promising ways to retain or convert toluene into harmless products. The present work aims to develop a bifunctional material which can be used as an adsorbent and catalyst for low-temperature toluene removal. Copper zeolites were obtained by exchanging the sodium in the parent NaX zeolite with copper from aqueous solutions of Cu(NO3)2∙2.5H2O. Several characterization techniques, H2-TPR, XPS, XRD and N2 physisorption, were used in order to evaluate the redox, surface, structural and textural properties of the materials, respectively. The various materials were tested in adsorption and catalytic processes. The sample with low copper content (1 wt. %) exhibited promising features in terms of toluene adsorption capacity and total oxidation. The results can be correlated to the presence of micropores and well-dispersed CuO species.
Published: 2015
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5. Origins of spectral broadening of incoherent waves: Catastrophic process of coherence degradation

Author: Antonio Picozzi, Alexandre Kudlinski, Benno Rumpf, Pierre Suret, Gang Xu, Adrien Fusaro, Josselin Garnier, Stéphane Randoux, Guy Millot, Centre de Mathématiques Appliquées - Ecole Polytechnique ( CMAP ), École polytechnique ( X ) -Centre National de la Recherche Scientifique ( CNRS ), Matériaux, Procédés et Technologie des Composites, Institut de Recherche en Génie Civil et Mécanique ( GeM ), Université de Nantes ( UN ) -École Centrale de Nantes ( ECN ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Nantes ( UN ) -École Centrale de Nantes ( ECN ) -Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 ( PhLAM ), Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), Laboratoire de Spectronomie Moléculaire ( SMIL ), Université de Bourgogne ( UB ), Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] ( LICB ), Université de Technologie de Belfort-Montbeliard ( UTBM ) -Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), Institut d'électronique fondamentale (IEF), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS), Structure et fonctionnement des systèmes hydriques continentaux (SISYPHE), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Centre de Mathématiques Appliquées - Ecole Polytechnique (CMAP), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-École pratique des hautes études (EPHE)-MINES ParisTech - École nationale supérieure des mines de Paris-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de l'Université de Bourgogne (LPUB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institut d'électronique fondamentale [IEF], Structure et fonctionnement des systèmes hydriques continentaux [SISYPHE], Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM], Laboratoire de Physique de l'Université de Bourgogne [LPUB], Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB], Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Non-equilibrium thermodynamics, FOS: Physical sciences, Pattern Formation and Solitons (nlin.PS), Wake, Kinetic energy, 01 natural sciences, Spectral line, 010305 fluids & plasmas, symbols.namesake, Optics, [ MATH.MATH-AP ] Mathematics [math]/Analysis of PDEs [math.AP], [MATH.MATH-ST]Mathematics [math]/Statistics [math.ST], 0103 physical sciences, [MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP], [NLIN]Nonlinear Sciences [physics], [ MATH.MATH-ST ] Mathematics [math]/Statistics [math.ST], 010306 general physics, ComputingMilieux_MISCELLANEOUS, Physics, [PHYS]Physics [physics], business.industry, Nonlinear Sciences - Pattern Formation and Solitons, Computational physics, Supercontinuum, [MATH.MATH-PR]Mathematics [math]/Probability [math.PR], symbols, business, Hamiltonian (quantum mechanics), [ MATH.MATH-PR ] Mathematics [math]/Probability [math.PR], Doppler broadening, Coherence (physics)
Abstract: We revisit the mechanisms underlying the process of spectral broadening of incoherent optical waves propagating in nonlinear media on the basis of nonequilibrium thermodynamic considerations. A simple analysis reveals that a prerequisite for the existence of a significant spectral broadening of the waves is that the linear part of the energy (Hamiltonian) has different contributions of opposite signs. It turns out that, at variance with the expected soliton turbulence scenario, an increase of the amount of disorder (incoherence) in the system does not require the generation of a coherent soliton structure. We illustrate the idea by considering the propagation of two wave components in an optical fiber with opposite dispersion coefficients. A wave turbulence approach of the problem reveals that the increase of kinetic energy in one component is offset by the negative reduction in the other component, so that the waves exhibit, as a general rule, a virtually unlimited spectral broadening. More precisely, a self-similar solution of the kinetic equations reveals that the spectra of the incoherent waves tend to relax toward a homogeneous distribution in the wake of a front that propagates in frequency space with a decelerating velocity. We discuss this catastrophic process of spectral broadening in the light of different important phenomena, in particular supercontinuum generation, soliton turbulence, wave condensation, and the runaway motion of mechanical systems composed of positive and negative masses.
Published: 2017
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6. Nature of the Ba 4d Splitting in BaTiO3 Unraveled by a Combined Experimental and Theoretical Study

Author: Pierre-Marie Deleuze, Hélène Magnan, Antoine Barbier, Zheshen Li, Alberto Verdini, Luca Floreano, Bruno Domenichini, Céline Dupont, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Electronique et nanoPhotonique Organique (LEPO), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre National de la Recherche Scientifique (CNRS), Centre for Storage Ring Facilities [Aarhus] (ISA), Aarhus University [Aarhus], Laboratorio Nazionale TASC (TASC), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR)-INFM, ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017), ANR-15-CE05-0014,PHOTO-POT,Photoelectrolyse de l'eau assistée par un potentiel interne(2015), and European Project: 730872,CALIPSOplus
Subjects: [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry, General Energy, Barium, Electrical energy, Oxides, Physical and Theoretical Chemistry, Layers, Diffraction, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract: International audience; In this paper, synchrotron radiation photoemission techniques are used to unravel the pending nature of the two Ba 4d components, also observed on Ba 3d lines, and commonly named Ba(α) and Ba(β). Investigations were carried out on the (001) surface of epitaxial very thin (≤ 20 nm) films combined with DFT calculations. Photoelectron diffraction experiments reveal different behaviors for Ba(α) and Ba(β) components. While six well defined diffraction features corresponding to the BaTiO$_3$ bulk structure are observed for the Ba(α) component, no feature really appears in the diffraction pattern of Ba(β). This observations reveal the absence of forward scattering processes, hence this component comes mostly from surface BaO plane. Supporting these results, DFT calculations demonstrate a shift to lower binding energy (BE) only for the Ba 4d peak from the topmost BaO layer with respect to the photoelectron peak stemming from bulk layers. Hence, only one peak (the Ba(α) one) should be observed for a sample with a complete TiO$_2$ termination. This hypothesis is supported by photoemission measurements carried out at low photon energy in grazing angle emission, in order to enhance the signal from topmost layers with respect to the bulk. For each sample, the Ba(β)/Ba(α) intensity ratio is well reproduced by a model where the Ba(β) signal is only coming from the topmost surface BaO plane.
Published: 2022
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7. Selective Photocatalytic Dehydrogenation of Formic Acid by an In Situ-Restructured Copper-Postmetalated Metal–Organic Framework under Visible Light

Author: Houeida Issa Hamoud, Patrick Damacet, Dong Fan, Nisrine Assaad, Oleg I. Lebedev, Anna Krystianiak, Abdelaziz Gouda, Olivier Heintz, Marco Daturi, Guillaume Maurin, Mohamad Hmadeh, Mohamad El-Roz, Laboratoire catalyse et spectrochimie (LCS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), American University of Beirut [Beyrouth] (AUB), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Université de Montpellier (UM), Laboratoire de cristallographie et sciences des matériaux (CRISMAT), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche sur les Matériaux Avancés (IRMA), Normandie Université (NU)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Rouen Normandie (UNIROUEN), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and University of Toronto
Subjects: Colloid and Surface Chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Operando FTIR, Formic acid, [CHIM.CATA]Chemical Sciences/Catalysis, General Chemistry, Photocatalysis, Biochemistry, MOFs, Copper, Catalysis, Hydrogen
Abstract: International audience; Formic acid is considered as one of the most promising liquid organic hydrogen carriers (LOHC). Its catalytic dehydrogenation processes generally suffer from low activity, low reaction selectivity, low stability of the catalysts and/or the use of noble-metal based catalysts. Herein, we report a highly selective, efficient, and noble metal-free photocatalyst for the dehydrogenation of formic acid. This catalyst is built from a post-metalation of a carboxylic-functionalized Zr-MOF by copper, namely UiO-66(COOH)2-Cu. The visible light driven photocatalytic dehydrogenation process through the release of hydrogen and carbon dioxide is monitored in real-time via operando FTIR and reveals almost 100% of selectivity with high stability (over 3 days) and conversion yield exceeding 60% (around 5 mmol.g-1 cat.h-1) at ambient conditions. These performance indicators make UiO-66(COOH)2-Cu among the top photocatalysts for formic acid dehydrogenation. Interestingly, the as-prepared UiO-66(COOH)2-Cu hetero-nanostructure was found moderately active under solar irradiation during an induction phase, whereupon it undergoes an in-situ restructuring process through intra-framework cross-linking with the formation of the anhydride analogue structure, UiO-66(COO)2-Cu, and nano-clustering of highly active and stable copper sites as evidenced by the operando studies coupled with steady state isotopic transient kinetic (SSITKA) experiment, TEM, XPS analysis and DFT calculations. Beyond revealing outstanding catalytic performance for UiO-66(COO)2-Cu, this work delivers an in-depth understanding of the photocatalytic reaction mechanism implying an evolutive behavior of the post-metalated copper as well as the MOF framework over the reaction. These key findings pave the ways towards the engineering of new simple and efficient catalysts for photocatalytic dehydrogenation of formic acid.
Published: 2022
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8. Fabrication and characterization of tapered photonic crystal fiber for broadband 2 µm: four-wave mixing-based fibered OPCPA

Author: Sidi-Ely Ahmedou, Guillaume Walter, Jules Herbuvaux, Romain Dauliat, Sébastien Février, Stéphane Petit, Constance Valentin, Denis Marion, Jérôme Lhermite, Laurent Labonté, Sébastien Tanzilli, Frédéric Gérôme, Benoit Debord, Fetah Benabid, Baptiste Leconte, Guy Millot, Phillipe Roy, Raphaël Jamier, Jean-Christophe Delagnes, Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Nice (INPHYNI), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics and Astronomy (miscellaneous), General Engineering, Photonic crystal fiber, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, General Physics and Astronomy, Middle infrared, Amplified spontaneous emission, Four wave mixing
Abstract: We present the simulation, fabrication, and characterization of large area microstructured fiber tapers which enables broadband phasematching conditions of the four wave-mixing process. These silica-based tapers are intended to serve as a nonlinear gain medium for intense and high average power Fiber Optical Parametric Chirped Pulse Amplifier emitting at 2 $$\upmu \hbox {m}$$ μ m and strongly pumped at Yb wavelength. Different geometries (tapered/untapered, aspect ratio, etc.) are fabricated, analyzed and their broadening properties—key for supporting ultrashort pulses amplification—are compared and discussed. The characterization of nonlinear gain bandwidth of the tapers relies on a tunable source of stochastic pulses based on tunable amplified spontaneous emission in Yb-doped amplifiers. The strong overshoots of this source allows degenerate four-wave mixing process to occur thus generating broadband incoherent visible signal and mid-infrared idler waves at much lower average power than usually needed with coherent pumping. The idler centered around 1.85 $$\mu$$ μ m is broadened due to zero-dispersion wavelength shift along the taper.
Published: 2023
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9. Au/WO3 nanocomposite based photocatalyst for enhanced solar photocatalytic activity

Author: Margaux Desseigne, Véronique Madigou, Marie-Vanessa Coulet, Olivier Heintz, Virginie Chevallier, Madjid Arab, Institut des Matériaux, de Microélectronique et des Nanosciences de Provence (IM2NP), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS), Matériaux divisés, interfaces, réactivité, électrochimie (MADIREL), Aix Marseille Université (AMU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: General Chemical Engineering, [CHIM]Chemical Sciences, General Physics and Astronomy, General Chemistry, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract: International audience
Published: 2023
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10. Nitrogen quantification and tracking during high temperature oxidation in air of titanium using 15N isotopic labelling

Author: V. Optasanu, P. Berger, M.C. Marco de Lucas, M. Khan Rayhan, F. Herbst, N. Geoffroy, O. Heintz, I. Bezverkhyy, S. Chevalier, T. Montesin, L. Lavisse, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etudes des Eléments Légers (LEEL - UMR 3685), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Titanium, nitrides, oxidation, General Chemical Engineering, nuclear reaction analysis, N2/O2 diffusion, General Materials Science, General Chemistry, [CHIM.MATE]Chemical Sciences/Material chemistry
Abstract: International audience; Isotopic labelling was used to track the diffusion of nitrogen during the oxidation of Titanium in air at 700°C. Alternate exposure in 15 N2-labelled air and regular air was used. The nitrogen is mainly located at the oxide/metal interface and forms essentially a nitride phase close to Ti2N. Each nitrogen isotope was quantified by Nuclear Reaction Analysis. Nitrogen quantity doubles between 5 and 20 h, which represents 16 % respectively 12.5 %, of the total mass gains. The nitrogen is partially renewed by both inward and outward diffusion during the oxidation. A model for nitrides migration is proposed.
Published: 2023
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11. Origin of the Unusual High Optical Nonlinearities Observed in Glassy Chalcogenides

Author: Dory, Jean‐baptiste, Ibnoussina, Meryem, Raty, Jean‐yves, Jager, Jean‐baptiste, Verdy, Anthonin, Coillet, Aurélien, Colman, Pierre, Albanese, Anthony, Tomelleri, Martina, Cluzel, Benoit, Noé, Pierre, Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Silicon Nanoelectronics Photonics and Structures (SiNaps), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Université de Bourgogne (UB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
Subjects: [PHYS]Physics [physics], [SPI]Engineering Sciences [physics]
Abstract: International audience
Published: 2023
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12. Plug-and-play measurement of chromatic dispersion by means of two-photon interferometry

Author: Dalidet, Romain, Martin, Anthony, Riesner, Mattis, Ahmedou, Sidi-Ely, Dauliat, Romain, Leconte, Baptiste, Walter, Guillaume, Sauder, Grégory, Delagnes, Jean-Christophe, Millot, Guy, Roy, Philippe, Jamier, Raphaël, Tanzilli, Sébastien, Labonté, Laurent, HEP, INSPIRE, Institut de Physique de Nice (INPHYNI), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire de France (IUF), and Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.)
Subjects: Quantum Physics, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], FOS: Physical sciences, Quantum Physics (quant-ph), [PHYS.QPHY] Physics [physics]/Quantum Physics [quant-ph]
Abstract: International audience; Since the first proof-of-principle experiments 25 years ago, quantum metrology has matured from fundamental concepts to versatile and powerful tools in a large variety of research branches, such as gravitational-wave detection, atomic clocks, plasmonic sensing, and magnetometry. At the same time, two-photon interferometry, which underpins the possibility of entanglement to probe optical materials with unprecedented levels of precision and accuracy, holds the promise to stand at the heart of innovative functional quantum sensing systems. We report a novel quantum-based method for measuring the frequency dependence of the velocity in a transparent medium, i.e, the chromatic dispersion (CD). This technique, using energy-time entangled photons, allows straightforward access to CD value from the visibility of two-photon fringes recorded in a free evolution regime. In addition, our quantum approach features all advantages of classical measurement techniques, i.e, flexibility and accuracy, all in a plug-and-play system.
Published: 2023

13. Comparison of thermal diffusion and interfacial reactions for bulk and sputtered titanium on 316L stainless steel

Author: AUGER, Jean-Marc, COTTON, Dominique, NOUVEAU, Corinne, BESNARD, Aurélien, BERNARD, Frédéric, ARDIGO-BESNARD, Maria-Rosa, MONCHOUX, Jean-Philippe, COURS, R., MARCELOT, Cécile, Laboratoire Bourguignon des Matériaux et Procédés (LABOMAP), Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)
Subjects: matière Condensée: Science des matériaux [Physique], Titanium, Matériaux [Sciences de l'ingénieur], Intermetallics, Matériaux [Chimie], PVD coatings, General Materials Science, [CHIM.MATE]Chemical Sciences/Material chemistry, Condensed Matter Physics, Diffusion couple, Stainless steel
Abstract: International audience; As a first step to devise a hybrid process for the production of TiC wear coatings on 316L, consisting of magnetron sputtering followed by titanium carburization, interfacial reactivity between stainless steel and titanium has to be finely understood. Systematic comparisons were carried out on diffusion couples of increasing chemical and geometrical complexity (Fe/Ti, 316L/Ti, and 316L/sputtered Ti), highlighting the formation mechanisms of interfacial structures. Transmission and scanning electron microscopy composition profiles revealed that long-range microstructures in titanium are the result of iron diffusion and oxygen impurities interactions. FeTi and Fe2Ti intermetallics formation is first kinetically driven, then favors thermodynamic stability, leading to compositional changes during thermal cycles. Their growth is shown to be non-diffusion controlled. These compounds act as diffusion barriers for chromium, and traps for carbon, indirectly generating a complex layered structure at the interface. Differences between bulk and sputtered titanium are exclusively linked to the latter smaller scale, including destabilized diffusion fronts, and superficial TiO formation by oxygen rejection after iron diffusion.
Published: 2023
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14. NEUROPULS: NEUROmorphic energy-efficient secure accelerators based on Phase change materials aUgmented siLicon photonicS

Author: Pavanello, Fabio, Marchand, Cédric, O'Connor, Ian, Orobtchouk, Régis, Mandorlo, Fabien, Letartre, Xavier, Cueff, Sébastien, Vatajelu, Ioana, Di Natale, Giorgio, Cluzel, Benoit, Coillet, Aurélien, Charbonnier, Benoit, Noé, Pierre, Kaván, František, Zoldak, Martin, Szaj, Michal, Bienstman, Peter, van Vaerenbergh, Thomas, Rührmair, Ulrich, Flores, Paulo, Guerra E Silva, Luis, Chaves, Ricardo, Silveira, Luis Miguel, Ceccato, Mariano, Gizopoulos, Dimitris, Papadimitriou, George, Karakostas, Vasileios, Brando, Axel, Cazorla, Francisco Javier, Canal, Ramon, Closas, Pau, Gusi Amigo, Adrià, Crovetti, Paolo Stefano, Carpegna, Alessio, Tzamn, Melendez Carmona, Di Carlo, Stefano, Savino, Alessandro, INL - Ingénierie et conversion de lumière (i-Lum) (INL - I-Lum), 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 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), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INL - Conception de Systèmes Hétérogènes (INL - CSH), Architectures and Methods for Resilient Systems (TIMA-AMfoRS ), Techniques de l'Informatique et de la Microélectronique pour l'Architecture des systèmes intégrés (TIMA), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ), Université Grenoble Alpes (UGA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Argotech a.s., Universiteit Gent = Ghent University (UGENT), Fakultät für Physik - Ludwig-Maximilians-Universität [München/Munich] (LMU), Ludwig-Maximilians University [Munich] (LMU), Instituto de Engenharia de Sistemas e Computadores (INESC), Department of Computer Science [Verona] (UNIVR | DI), Università degli studi di Verona = University of Verona (UNIVR), Department of Informatics and Telecomunications [Kapodistrian Univ] (DI NKUA), National and Kapodistrian University of Athens (NKUA), Barcelona Supercomputing Center - Centro Nacional de Supercomputacion (BSC - CNS), Universitat Politècnica de Catalunya [Barcelona] (UPC), Albora Technologies Limited [Barcelona], Department of Electronics and Telecommunications = DET Dipartimento di Elettronica e Telecomunicazioni [Politecnico di Torino] (DET), Politecnico di Torino = Polytechnic of Turin (Polito), Department of Computer Engineering (DAUIN), IEEE, and European Project: 101070238,HORIZON-CL4-2021-DIGITAL-EMERGING-01 ,NEUROPULS(2023)
Subjects: Signal Processing (eess.SP), FOS: Computer and information sciences, PACS 85.42, Hardware Architecture (cs.AR), FOS: Electrical engineering, electronic engineering, information engineering, modeling, Electrical Engineering and Systems Science - Signal Processing, [SPI.NANO]Engineering Sciences [physics]/Micro and nanotechnologies/Microelectronics, Computer Science - Hardware Architecture, simulation, artificial neural networks
Abstract: This special session paper introduces the Horizon Europe NEUROPULS project, which targets the development of secure and energy-efficient RISC-V interfaced neuromorphic accelerators using augmented silicon photonics technology. Our approach aims to develop an augmented silicon photonics platform, an FPGA-powered RISC-V-connected computing platform, and a complete simulation platform to demonstrate the neuromorphic accelerator capabilities. In particular, their main advantages and limitations will be addressed concerning the underpinning technology for each platform. Then, we will discuss three targeted use cases for edge-computing applications: Global National Satellite System (GNSS) anti-jamming, autonomous driving, and anomaly detection in edge devices. Finally, we will address the reliability and security aspects of the stand-alone accelerator implementation and the project use cases., Comment: 10 pages, 2 figures, conference
Published: 2023
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15. Lead-vanadate sorbents for iodine trapping and their conversion into an iodoapatite-based conditioning matrix

Author: R, Pénélope, L, Campayo, M, Fournier, S, Le Gallet, A, Gossard, A, Grandjean, CEA Marcoule, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: filter, iodine, off-gas, apatite, waste disposal, [CHIM]Chemical Sciences, General Chemistry, filter iodine off-gas apatite waste disposal
Abstract: New lead-vanadate based sorbents were synthesized with the aim to entrap and confine gaseous iodine in off-gas streams coming from reprocessing facilities of spent nuclear fuel. Their synthesis relies on the shaping of a lead-vanadate, lead sulfide and alginic acid mix as millimetric beads. These beads were calcined between 220°C and 500°C to remove organic alginic compounds template. However, according to the calcination temperature, lead sulfide could be partially oxidized, limiting iodine loading capacity. A compromise temperature between 290°C and 350°C was found to remove most of the alginic acid template and avoiding lead sulfide oxidation. These sorbents were tested for iodine trapping in static conditions at 60°C. They performed well with a sorption capacity up to 155 mg.g−1 by forming PbI2. Furthermore, these iodine-loaded sorbents could be easily converted into an iodine-containing lead-vanadate apatite matrix by spark plasma sintering. A dense sample was produced for a sintering temperature of 500°C under 70 MPa. Such a material could be suitable for radioactive iodine conditioning in deep geological disposal. Finally, lead-vanadate sorbents could provide an easy way to entrap and confine radioactive iodine from off-gas streams into a durable material within a few steps.
Published: 2022
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16. BINDING OF DNA TO NATURAL SEPIOLITE: APPLICATIONS IN BIOTECHNOLOGY AND PERSPECTIVES

Author: Bernard S. Lopez, Sandrine Ragu, Olivier Piétrement, [Institut Cochin] Département Développement, Reproduction et Cancer (DRC), Institut Cochin (IC UM3 (UMR 8104 / U1016)), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and Lopez, Bernard
Subjects: [PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], [SDV]Life Sciences [q-bio], Sepiolite, Soil Science, 02 engineering and technology, Natural (archaeology), [PHYS] Physics [physics], 03 medical and health sciences, chemistry.chemical_compound, Geochemistry and Petrology, [CHIM] Chemical Sciences, Earth and Planetary Sciences (miscellaneous), [CHIM]Chemical Sciences, [SDV.IB.BIO]Life Sciences [q-bio]/Bioengineering/Biomaterials, ComputingMilieux_MISCELLANEOUS, Bacterial transformation, 030304 developmental biology, Water Science and Technology, DNA plasmid extraction, [PHYS]Physics [physics], 0303 health sciences, Polymer science, DNA transfection in mammalian cells, 021001 nanoscience & nanotechnology, DNA interaction, [SDV] Life Sciences [q-bio], chemistry, 0210 nano-technology, DNA
Abstract: International audience; DNA manipulation is crucial for many biotechnological prospects and for medical applications such as gene therapy. This requires the amplification and extraction of DNA from bacteria and the transfer of these DNA molecules into cells, including bacterial and mammalian cells. The capacity of the natural magnesium silicate clay mineral sepiolite to bind to DNA makes it a potential useful tool for biotechnological/medical strategies. In addition, sepiolite is inexpensive and classified as non-toxic and non-carcinogenic. This review will first describe the physico-chemical interactions between sepiolite and DNA. Then, the leverage of sepiolite/DNA interactions for DNA extraction from bacteria, to optimize DNA transfer into bacteria and DNA transfection into mammalian cells are presented. Finally, the putative toxicity of sepiolite and its advantages and perspectives for future prospects, such as the improvement of immunotherapy are also discussed.
Published: 2021
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17. Inferring assembly-curving trends of bacterial micro-compartment shell hexamers from crystal structure arrangements

Author: Luis F. Garcia-Alles, Vanessa Soldan, Irma Custovic, Sara Castaño-Cerezo, Stéphanie Balor, Miguel Fuentes-Cabrera, Gilles Truan, Eric Lesniewska, David Reguera, Toulouse Biotechnology Institute (TBI), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre de Biologie Intégrative (CBI), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Oak Ridge National Laboratory [Oak Ridge] (ORNL), UT-Battelle, LLC, Universitat de Barcelona (UB), The Spanish MICINN is also acknowledged for funding D.R. work (project PGC2018-098373-B-I00)., and ANR-19-CE09-0032,SPACEHex,Maitrise spatial à l'aide de plateformes de protéines hexamèriques(2019)
Subjects: crystal structure, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, shell, hexamer, microscopy, nanotube, assembly curvature, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, bacterial micro-compartments
Abstract: Bacterial microcompartments (BMC) are complex macromolecular assemblies that participate to varied chemical processes in about one fourth of bacterial species. BMC-encapsulated enzymatic activities are segregated from other cell contents by means of semipermeable shells, justifying why BMC are viewed as prototype nano-reactors for biotechnological applications. Herein, we undertook a comparative study of trends of self-assembly of BMC hexamers (BMC-H), the most abundant shell constituents. Published and new microscopy data show that some BMC-H, likeβ-carboxysomal CcmK, tend to assemble flat whereas other BMC-H often build curved-implying objects. Inspection of available crystal structures presenting BMC-H in tiled arrangements permitted to identify two major assembly modes with a striking connection with experimental trends. All-atom molecular dynamics (MD) supported that BMC-H bending is triggered robustly only from the disposition adopted by BMC-H that form curved objects experimentally, conducting to almost identical arrangements to those found in structures of recomposed BMC shells. Simulations on ensembles of planar-behaving hexamers, which were previously reconfigured to comply with such disposition, confirmed that bending is defined by assembly details, rather than by BMC-H identity. Finally, although no common atomic determinants could be identified as responsible of BMC-H spontaneous curvature, an inter-hexamer ionic pair was pinpointed as contributor to hold a subset of BMC-H in low bending dispositions. These results are expected to improve our understanding of the variable mechanisms of biogenesis characterized for BMC, and of possible strategies to regulate BMC size and shape.
Published: 2022

18. Coherent two-beam steering of delocalized nonlinear photoluminescence in a plasmon cavity

Author: Florian Dell’Ova, Diana Shakirova, Yoann Brulé, Laureen Moreaud, Gérard Colas-des-Francs, Erik Dujardin, Alexandre Bouhelier, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), ITMO University [Russia], Groupe NanoSciences (CEMES-GNS), Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), ANR-15-IDEX-0003,BFC,ISITE ' BFC(2015), ANR-20-CE24-0001,DALHAI,Conception par intelligence artificielle hybride d'ALU plasmonique(2020), ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017), and European Project: PO FEDER-FSE Bourgogne 2014/2020
Subjects: [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Atomic and Molecular Physics, and Optics
Abstract: International audience; We aim at controlling the spatial distribution of nonlinear photoluminescence in a shaped micrometer-size crystalline gold flake. Interestingly, the underlying surface plasmon modal landscape sustained by this mesoscopic structure can be advantageously used to generate nonlinear photoluminescence (nPL) in remote locations away from the excitation spot. By controlling the modal pattern, we show that the delocalized nonlinear photoluminescence intensity can be redistributed spatially. This is first accomplished by changing the polarization orientation of the pulsed laser excitation in order to select a subset of available surface plasmon modes within a continuum. We then propose a second approach to redistribute the nPL within the structure by implementing a phase control of the plasmon interference pattern arising from a coherent two-beam excitation. Control and engineering of the nonlinear photoluminescence spatial extension is a prerequisite for deploying the next generation of plasmonic-enabled integrated devices relying on hot carriers.
Published: 2022
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19. Hot Carriers-Induced Nonlinear Photoluminescence in Thin Indium Tin Oxide Layer Patterned by Ga Ion Beam Milling

Author: Florian Dell’Ova, Konstantin Malchow, Rémi Chassagnon, Olivier Heintz, Nicolas Pocholle, Gérard Colas des Francs, Erik Dujardin, Alexandre Bouhelier, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Groupe NanoSciences (CEMES-GNS), Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), ANR-20-CE24-0001,DALHAI,Conception par intelligence artificielle hybride d'ALU plasmonique(2020), ANR-15-IDEX-0003,BFC,ISITE ' BFC(2015), ANR-21-ESRE-0040,SMARTLIGHT,SMARTLIGHT(2021), ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017), and European Project: PO FEDER-FSE Bourgogne 2014/2020
Subjects: Focused Ion Beam, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], Irradiation Dose, Patterned Film, Nonlinear Photoluminescence, Hot Electrons, Indium Tin Oxide, Femtosecond Pulses, Thermal Coefficient
Abstract: 26 p.; International audience; This paper explores the nonlinear photoluminescence emitted by Indium Tin Oxide (ITO) thin layers patterned by focused gallium ion beam milling. Using tightly focused near-infrared femtosecond pulsed laser excitation, a broad up-converted luminescence spanning the visible spectrum is detected. The intensity of the luminescence follows a non-monotonous relationship with milling doses and can be related to the modification of the ITO electronic band structure by the implantation of Ga ions. The shape and the power dependence of the spectrum share strong similarities with nonlinear photoluminescence arising from metals. The results are consistent with a nonlinear luminescence process originating from the radiative decay of photo-generated hot carriers. The ther-1 mal coefficient relating the hot carrier temperature to the laser intensity is determined as a function of milling dose.
Published: 2022
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20. Planar bridging an atomically precise surface trench with a single molecular wire on an Au(1 1 1) surface

Author: Umamahesh Thupakula, Xavier Bouju, Jesús Castro-Esteban, Erik Dujardin, Diego Peña, Christian Joachim, Groupe NanoSciences (CEMES-GNS), Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées (INSA)-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Centro de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS ), Universidade de Santiago de Compostela [Spain] (USC ), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), International Center for Materials Nanoarchitectonics (WPI-MANA), Spanish Agencia Estatal de Investigación (PID2019-107338RB-C62), Spanish Agencia Estatal de Investigación (PCI2019-111933-2), Centro de Investigación de Galicia accreditation 2019–2022, ED431G 2019/03, World Premier International Center (WPI) Initiative on Nanoarchitectonics (MANA-NIMS), MEXT (Japan), HPC resources of CALMIP supercomputing center under the allocation 2021-P0832, European Project: Grant N° 895239,GNR Conductance, European Project: Grant No 863098,SPRING, Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)
Subjects: DI/dV mapping, Single molecule contact, Condensed Matter - Mesoscale and Nanoscale Physics, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], Mesoscale and Nanoscale Physics (cond-mat.mes-hall), FOS: Physical sciences, General Physics and Astronomy, Molecular manipulation, Physics - Applied Physics, Applied Physics (physics.app-ph), [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Physical and Theoretical Chemistry, LT-UHV STM
Abstract: International audience; In a bridge configuration, a single graphene nanoribbon (GNR) is positioned with a picometer precision over a trench in between two monoatomic steps on an Au(111) surface. This GNR molecular wire adopts a deformed conformation towards the down terrace in between the two contact step edges. Using differential conductance dI/dV mapping from a low-temperature scanning tunneling microscope, it is demonstrated how the electronic delocalization along GNR is cut at each contact by its down curvature. It points out the need to bring conductive nanocontacts backside of the support for preserving the front side GNR planar conformation.
Published: 2022
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21. Thermalization and condensation in an incoherently pumped passive optical cavity

Author: Antonio Picozzi, Robin Kaiser, Stéphane Randoux, Pierre Suret, Marc Haelterman, Claire Michel, Laboratoire de physique de la matière condensée (LPMC), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS), Université libre de Bruxelles (ULB), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Institut Non Linéaire de Nice Sophia-Antipolis (INLN), Laboratoire Interdisciplinaire Carnot de Bourgogne (LICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA), Laboratoire de physique de la matière condensée ( LPMC ), Université Nice Sophia Antipolis ( UNS ), Université Côte d'Azur ( UCA ) -Université Côte d'Azur ( UCA ) -Centre National de la Recherche Scientifique ( CNRS ), Université Libre de Bruxelles [Bruxelles] ( ULB ), Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 ( PhLAM ), Université de Lille-Centre National de la Recherche Scientifique ( CNRS ), Institut Non Linéaire de Nice Sophia-Antipolis ( INLN ), Laboratoire Interdisciplinaire Carnot de Bourgogne ( LICB ), Université de Bourgogne ( UB ) -Centre National de la Recherche Scientifique ( CNRS ), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Laboratoire de physique de la matière condensée [LPMC], Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 [PhLAM], Institut Non Linéaire de Nice Sophia-Antipolis [INLN], and Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
Subjects: Thermodynamic equilibrium, Plane wave, Physics::Optics, Optical field, Frequency conversion, including higher-order harmonic generation, 01 natural sciences, optical instabilities, harmonic generation, law.invention, Schrödinger equation, 010309 optics, symbols.namesake, law, Quantum mechanics, Dynamics of nonlinear optical systems, 0103 physical sciences, 010306 general physics, Equipartition theorem, Physics, [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [ PHYS.PHYS.PHYS-OPTICS ] Physics [physics]/Physics [physics]/Optics [physics.optics], and optical spatio-temporal dynamics, Atomic and Molecular Physics, and Optics, Optical cavity, Quantum electrodynamics, symbols, Dissipative system, optical chaos and complexity, Hamiltonian (quantum mechanics), Coherence
Abstract: International audience; We study theoretically and numerically the condensation and the thermalization of classical optical waves in an incoherently pumped passive Kerr cavity. We show that the dynamics of the cavity exhibits a turbulent behavior that can be described by the wave turbulence theory. A mean-field kinetic equation is derived, which reveals that, in its high finesse regime, the cavity behaves essentially as a conservative Hamiltonian system. In particular, the intracavity turbulent field is shown to relax adiabatically toward a thermodynamic equilibrium state of energy equipartition. As a consequence of this effect of wave thermalization, the incoherent optical field undergoes a process of condensation, characterized by the spontaneous emergence of a plane wave from the incoherently pumped cavity. The condensation process is an equilibrium phase transition that occurs below a critical value of the (kinetic) energy of the incoherent pump. In spite of the dissipative nature of the cavity dynamics, the condensate fraction of the high-finesse cavity field is found in quantitative agreement with the theory inherited from the purely conservative (Hamiltonian) nonlinear Schr¨odinger equation.
Published: 2011
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22. On-surface Double layer polymerization enhancing GNR lengths on an Au(111) surface

Author: Thupakula, Umamahesh, Soe, We -Hyo, Joachim, Christian, Dujardin, Erik, Groupe NanoSciences (CEMES-GNS), Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and Joachim, Christian
Subjects: [CHIM] Chemical Sciences, [CHIM]Chemical Sciences
Abstract: By performing controlled step-by-step annealing experiments of bilayers of GNR monomer reactants with multiple UHV-STM analysis of intermediate stages, we show that the coupling reaction takes place mainly in the uppermost layer of the monomer bilayer despite being separated from the Au(111) surface by the lowermost compact monomer carpet. This demonstrates that the initial monomer bilayer configuration plays acrucial role in lengthening the final GNR length once the intermediate dehalogenated polymer is cyclodehydrogenated. In this respect our experimental results directly provide the counter rationalization to the generalization of the metallic substrate catalytic role in the surface assisted coupling chemical reactions.
Published: 2022

23. Rapid characterisation of Photonic Crystal Fibre dispersive properties by a stochastic and tunable picosecond pump source

Author: Walter, Guillaume, Ahmedou, Sidi-Ely, de Thoury, Thelma, Santos, Nicolas, Herbuvaux, Jules, Redon, Melvin, Delagnes, Jean-Christophe, Dauliat, Romain, Février, Sébastien, Valentin, Constance, Petit, Stéphane, Valero, Nicolas, Marion, Denis, Lhermite, Jérôme, Tanzilli, Sébastien, Gérôme, Frédéric, Debord, Benoît, Benabid, Fetah, Millot, Guy, Roy, Philippe, Jamier, Raphael, Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Nice (INPHYNI), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and Gerome, Frédéric
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic
Abstract: International audience
Published: 2022

24. High Recyclability Magnetic Iron Oxide‐Supported Ruthenium Nanocatalyst for H 2 Release from Ammonia‐Borane Solvolysis

Author: Didier Poinsot, Moad Bouzid, Agathe Burlot, Clève D. Mboyi, Pierre‐Emmanuel Doulain, Jérémy Paris, Olivier Heintz, Bruno Domenichini, Vincent Collière, Myrtil L. Kahn, Jean‐Cyrille Hierso, Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon] (ICMUB), Université de Bourgogne (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Bourgogne (UB), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de chimie de coordination (LCC), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), CNRS, Université de Bourgogne, Conseil Régional Bourgogne Franche-Comté, and PIA-excellence ISITE-BFC (COMICS project 'Chemistry of Molecular Interactions Catalysis and Sensors' (FEDER)
Subjects: Biomaterials, Renewable Energy, Sustainability and the Environment, Methanolysis, Materials Chemistry, Magnetic recycling, Ruthenium nanocomposite, [CHIM]Chemical Sciences, Energy Engineering and Power Technology, [CHIM.CATA]Chemical Sciences/Catalysis, Ammonia-borane, Hydrogen
Abstract: International audience; We report the high capacity of recycling of a technologically simple, easily recoverable, Ru@Fe3O4 magnetic nanocatalyst, efficient in the release of H2 from ammonia-borane (AB) solvolysis, using H2O or methanol at room temperature (25 °C). The initially oxidized Ru small nanoparticles (2–4 nm) are well-dispersed on an iron oxide support (i. e. super paramagnetic iron oxide of spinel structure, SPIO, as aggregates of 20 nm to a few μm). As nanocatalyst, this composite achieved short-time (
Published: 2022
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25. Laser textured titanium surface characterization

Author: Laura Convert, Eric Bourillot, Manuel François, Nicolas Pocholle, Florence Baras, Olivier Politano, Sophie Costil, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée (LASMIS), Université de Technologie de Troyes (UTT), ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017), and ANR-19-CE42-0007,OmicroN,Contrôle non destructif de changements micromécaniques locaux par champ proche micro-onde(2019)
Subjects: General Physics and Astronomy, Surfaces and Interfaces, General Chemistry, [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], Condensed Matter Physics, Surfaces, Coatings and Films
Abstract: International audience
Published: 2022
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26. Selective laser melting (SLM) of CX stainless steel: Theoretical calculation, process optimization and strengthening mechanism

Author: Hanlin Liao, Wenyou Ma, Cheng Chang, Min Liu, Dongdong Dong, Xingchen Yan, Sihao Deng, Hao Wang, Julien Gardan, Rodolphe Bolot, Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée (LASMIS), Université de Technologie de Troyes (UTT), EPF [Troyes], Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Austenite, Materials science, Polymers and Plastics, Scanning electron microscope, Mechanical Engineering, Metals and Alloys, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, Microstructure, 01 natural sciences, 0104 chemical sciences, [SPI]Engineering Sciences [physics], Mechanics of Materials, Transmission electron microscopy, Martensite, Materials Chemistry, Ceramics and Composites, Relative density, Composite material, Selective laser melting, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, Electron backscatter diffraction
Abstract: In the present work, selective laser melting (SLM) technology was utilized for manufacturing CX stainless steel samples under a series of laser parameters. The effect of laser linear energy density on the microstructure characteristics, phase distribution, crystallographic orientation and mechanical properties of these CX stainless steel samples were investigated theoretically and experimentally via scanning electron microscope (SEM), X-ray diffraction (XRD), electron backscatter diffraction (EBSD) and transmission electron microscope (TEM). Based on the systematic study, the SLM CX stainless steel sample with best surface roughness (Ra = 4.05 ± 1.8 μm) and relative density (Rd = 99.72 %±0.22 %) under the optimal linear density (η = 245 J/m) can be obtained. SLM CX stainless steel was primarily constituted by a large number of fine martensite (α’ phase) structures (i.e., cell structures, cellular dendrites and blocky grains) and a small quantity of austenite (γ phase) structures. The preferred crystallographic orientation (i.e., direction) can be determined in the XZ plane of the SLM CX sample. Furthermore, under the optimal linear energy density, the good combinations with the highest ultimate tensile strength (UTS = 1068.0 %±5.9 %) and the best total elongation (TE = 15.70 %±0.26 %) of the SLM CX sample can be attained. Dislocation strengthening dominates the strengthening mechanism of the SLM CX sample in as-built state.
Published: 2021
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27. Sensitivity analysis of the uncertainties of the mechanical design parameters: Stochastic study performed via a numerical design of experiment

Author: Ghinwa Ouaidat, Dominique Chamoret, Abel Cherouat, Raed Kouta, Automatic mesh generation and advanced methods (Gamma3), Université de Technologie de Troyes (UTT), Laboratoire Informatique et Société Numérique (LIST3N), Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Modélisation et Sûreté des Systèmes (LM2S), Université de Technologie de Troyes (UTT)-Université de Technologie de Troyes (UTT), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Bend radius, Energy Engineering and Power Technology, Proton exchange membrane fuel cell, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, 7. Clean energy, [SPI]Engineering Sciences [physics], Sensitivity (control systems), Porosity, Renewable Energy, Sustainability and the Environment, Design of experiments, Probabilistic logic, Mechanics, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Compression (physics), Clamping, 0104 chemical sciences, Fuel Technology, Statistical analysis, PEMFC, Contact pressure, 0210 nano-technology
Abstract: International audience; As the GDL (Gas diffusion layer) is the most sensitive component in the fuel cell, any change in its structure causes a change in its porosity, which strongly influences the contact between the components of the fuel cell. Note that the state of contact depends on the applied clamping pressure, the thickness and the porosity of the GDL, and the geometry of the rib (bending radius) of the BPP (Bipolar plates). These components can be subject to variations coming from very high compression, so it is necessary to consider the reliability of their dimension via modeling/simulation by the integration of uncertainties. In this article, we will study the influence on the contact pressure of the uncertainties of the mechanical design parameters. A probabilistic approach (Gauss's law) is applied to evaluate the effect of the mechanical uncertainties parameter on the contact pressure between GDL/MEA and GDL/BPP.
Published: 2021
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28. Nanocatalysts for High Selectivity Enyne Cyclization: Oxidative Surface Reorganization of Gold Sub-2-nm Nanoparticle Networks

Author: Philippe Serp, Emmanuel Lerayer, Pierre Roblin, M. Rosa Axet, Yuanyuan Min, Tuan-Anh Nguyen, Olivier Heintz, Iann C. Gerber, Julien Roger, Jean-Cyrille Hierso, Didier Poinsot, Romuald Poteau, Yannick Coppel, Myrtil L. Kahn, H. Nasrallah, Franck Jolibois, Stéphane Brandès, Institut de Chimie Moléculaire de l'Université de Bourgogne [Dijon] (ICMUB), Centre National de la Recherche Scientifique (CNRS)-Université de Bourgogne (UB)-Institut de Chimie du CNRS (INC), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne [Dijon] (LICB), Université de Bourgogne (UB)-Université de Technologie de Belfort-Montbeliard (UTBM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie Chimique (LGC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Laboratoire de physique et chimie des nano-objets (LPCNO), Institut de Recherche sur les Systèmes Atomiques et Moléculaires Complexes (IRSAMC), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC), Université de Bourgogne (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Fédération de recherche « Matière et interactions » (FeRMI), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), CNRS, Université de Bourgogne, Conseil Régional Bourgogne Franche-Comté (CHIMENE project), PIA-excellence ISITE-BFC program (COMICS project: Chemistry of Molecular Interactions Catalysis and Sensors), Fonds Européen de Développement Régional (FEDER), and ANR-16-CE07-0007,ICARE_1,Nanostrucutres métal@carbone innovante pour une catalyse durable(2016)
Subjects: Materials science, Alkyne, Ligands, 010402 general chemistry, 01 natural sciences, Article, enyne cyclization, Cycloisomerization, Cascade reaction, Selectivity, [CHIM.COOR]Chemical Sciences/Coordination chemistry, QD1-999, chemistry.chemical_classification, diamondoids, Enyne, 010405 organic chemistry, Combinatorial chemistry, Hydrocarbons, Nanomaterial-based catalyst, 0104 chemical sciences, Chemistry, chemistry, Cyclization, Colloidal gold, gold sub-2-nm nanoparticles, Propargyl, nanocatalysts, Gold
Abstract: International audience; Ultrasmall gold nanoparticles (NPs) stabilized in networks by polymantane ligands (diamondoids) were successfully used as precatalysts for highly selective heterogeneous gold-catalyzed dimethyl allyl(propargyl)malonate cyclization to 5-membered conjugated diene. Such reaction usually suffers from selectivity issues with homogeneous catalysts. This control over selectivity further opened the way to one-pot cascade reaction, as illustrated by the 1,6-enyne cycloisomerization–Diels–Alder reaction of dimethyl allyl propargyl malonate with maleic anhydride. The ability to assemble nanoparticles with controllable sizes and shapes within networks concerns research in sensors, medical diagnostics, information storage, and catalysis applications. Herein, the control of the synthesis of sub-2-nm gold NPs is achieved by the formation of dense networks, which are assembled in a single step reaction by employing ditopic polymantanethiols. By using 1,1′-bisadamantane-3,3′-dithiol (BAd-SH) and diamantane-4,9-dithiol (DAd-SH), serving both as bulky surface stabilizers and short-sized linkers, we provide a simple method to form uniformly small gold NPs (1.3 ± 0.2 nm to 1.6 ± 0.3 nm) embedded in rigid frameworks. These NP arrays are organized alongside short interparticular distances ranging from 1.9 to 2.7 nm. The analysis of gold NP surfaces and their modification were achieved in joint experimental and theoretical studies, using notably XPS, NMR, and DFT modeling. Our experimental studies and DFT analyses highlighted the necessary oxidative surface reorganization of individual nanoparticles for an effective enyne cycloisomerization. The modifications at bulky stabilizing ligands allow surface steric decongestion for the alkyne moiety activation but also result in network alteration by overoxidation of sulfurs. Thus, sub-2-nm nanoparticles originating from networks building create convenient conditions for generating reactive Au(I) surface single-sites—in the absence of silver additives—useful for heterogeneous gold-catalyzed enyne cyclization. These nanocatalysts, which as such ease organic products separation, also provide a convenient access for building further polycyclic complexity, owing to their high reactivity and selectivity.
Published: 2021
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29. Epidemiological Impact of GII.17 Human Noroviruses Associated With Attachment to Enterocytes

Author: Marie Estienney, Georges Tarris, Nicole Abou-Hamad, Alain Rouleau, Wilfrid Boireau, Rémi Chassagnon, Siwar Ayouni, Philippe Daval-Frerot, Laurent Martin, Frédéric Bouyer, Jacques Le Pendu, Alexis de Rougemont, Gael Belliot, CHU Dijon, Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Procédés Alimentaires et Microbiologiques [Dijon] (PAM), Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Institut Agro Dijon, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Interactions hôte-greffon-tumeur, ingénierie cellulaire et génique - UFC (UMR INSERM 1098) (RIGHT), Institut National de la Santé et de la Recherche Médicale (INSERM)-Etablissement français du sang [Bourgogne-Franche-Comté] (EFS [Bourgogne-Franche-Comté])-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-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)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Centre de Recherche en Cancérologie et Immunologie Nantes-Angers (CRCINA), Université d'Angers (UA)-Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre hospitalier universitaire de Nantes (CHU Nantes), and Pecqueret, Valérie
Subjects: Microbiology (medical), [SDV] Life Sciences [q-bio], [SDV]Life Sciences [q-bio], evolution, ligand affinity, norovirus, duodenum, Microbiology, HBGA
Abstract: International audience; For the last 30 years, molecular surveys have shown that human norovirus (HuNoV), predominantly the GII.4 genotype, is one of the main causative agents of gastroenteritis. However, epidemiological surveys have revealed the worldwide emergence of GII.17 HuNoVs. Genetic analysis confirmed that GII.17 strains are distributed into three variants (i.e., Kawasaki 308, Kawasaki 323, and CS-E1). Here, virus-like particles (VLPs) were baculovirus-expressed from these variants to study putative interactions with HBGA. Qualitative analysis of the HBGA binding profile of each variant showed that the most recent and predominant GII.17 variant, Kawasaki 308, possesses a larger binding spectrum. The retrospective study of GII.17 strains documented before the emergence of the dominant Kawasaki 308 variant showed that the emergence of a new GII.17 variant could be related to an increased binding capacity toward HBGA. The use of duodenal histological sections confirmed that recognition of enterocytes involved HBGA for the three GII.17 variants. Finally, we observed that the relative affinity of recent GII.17 VLPs for HBGA remains lower than that of the GII.4-2012 variant. These observations suggest a model whereby a combination of virological factors, such as polymerase fidelity and increased affinity for HBGA, and immunological factors was responsible for the incomplete and non-persistent replacement of GII.4 by new GII.17 variants.
Published: 2022
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30. Interplay of Thermalization and Strong Disorder: Wave Turbulence Theory, Numerical Simulations, and Experiments in Multimode Optical Fibers

Author: Nicolas Berti, Kilian Baudin, Adrien Fusaro, Guy Millot, Antonio Picozzi, Josselin Garnier, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Centre de Mathématiques Appliquées - Ecole Polytechnique (CMAP), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Analyse d’interactions stochastiques intelligentes et coopératives (ASCII), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS)-Inria Saclay - Ile de France, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria), ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017), ANR-21-ESRE-0040,SMARTLIGHT,SMARTLIGHT(2021), and ANR-19-CE46-0007,ICCI,Caracterisation des ondes incoherentes pour l'imagerie par correlations croisees(2019)
Subjects: [PHYS]Physics [physics], [MATH.MATH-PR]Mathematics [math]/Probability [math.PR], 76F02 78A60, [MATH.MATH-ST]Mathematics [math]/Statistics [math.ST], FOS: Physical sciences, General Physics and Astronomy, [MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP], Pattern Formation and Solitons (nlin.PS), Nonlinear Sciences - Pattern Formation and Solitons, Physics - Optics, Optics (physics.optics)
Abstract: We address the problem of thermalization in the presence of a time-dependent disorder in the framework of the nonlinear Schr\"odinger (or Gross-Pitaevskii) equation with a random potential. The thermalization to the Rayleigh-Jeans distribution is driven by the nonlinearity. On the other hand, the structural disorder is responsible for a relaxation toward the homogeneous equilibrium distribution (particle equipartition), which thus inhibits thermalization (energy equipartition). On the basis of the wave turbulence theory, we derive a kinetic equation that accounts for the presence of strong disorder. The theory unveils the interplay of disorder and nonlinearity. It unexpectedly reveals that a non-equilibrium process of condensation and thermalization can take place in the regime where disorder effects dominate over nonlinear effects. We validate the theory by numerical simulations of the nonlinear Schr\"odinger equation and the derived kinetic equation, which are found in quantitative agreement without using adjustable parameters. Experiments realized in multimode optical fibers with an applied external stress evidence the process of thermalization in the presence of strong disorder., Comment: 12 pages, 7 figures
Published: 2022
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31. Tracking the role of nitrogen in the improvement of the high temperature oxidation resistance of titanium by mechanical treatments

Author: Lavisse, L., Berger, P., Kanjer, A., Optasanu, V., Gorny, Cyril, Peyre, Patrice, François, Manuel, Montesin, T., Marco de Lucas, M.C., Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Etudes des Eléments Légers (LEEL - UMR 3685), Nanosciences et Innovation pour les Matériaux, la Biomédecine et l'Energie (ex SIS2M) (NIMBE UMR 3685), Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée (LASMIS), Université de Technologie de Troyes (UTT), and ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017)
Subjects: Titanium, High temperature corrosion, General Chemical Engineering, Interfaces, fungi, C. Oxidation, B. Nuclear reaction analysis, C. Mechanical surface treatments, General Chemistry, A. Titanium, [CHIM.MATE]Chemical Sciences/Material chemistry, Nuclear reaction analysis, Sciences de l'ingénieur, Mechanical surface treatments, C. Interfaces, C. High temperature corrosion, Oxidation, parasitic diseases, General Materials Science
Abstract: International audience; We report the role of ultrasonic shot-peening (SP) and laser-shock peening (LSP) on the insertion of atmospheric nitrogen during high temperature oxidation of pure titanium and the improvement of its oxidation resistance. Ion Beam analysis showed that for short oxidation durations, a layer of Ti 2 N is formed at the oxide-metal interface. However, only the LSP treatment leads to the formation of a long-term stable nitrogen-rich layer which acts as a barrier for the diffusion of oxygen. This explains the efficiency of the LSP treatment to reduce the oxidation of Ti and prevent embrittlement.
Published: 2022
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32. Enhancement of Mechanical Properties and Corrosion Resistance of HVOF-Sprayed NiCrBSi Coatings Through Mechanical Attrition Treatment (SMAT)

Author: J. Creus, Christophe Verdy, K. Aoudia, Delphine Retraint, Frédéric Sanchette, C. Langlade, Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée (LASMIS), Institut Charles Delaunay (ICD), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Sciences de l'Ingénieur pour l'Environnement - UMR 7356 (LaSIE), and La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 010302 applied physics, Sonotrode, Materials science, [PHYS.MECA]Physics [physics]/Mechanics [physics], 02 engineering and technology, engineering.material, Condensed Matter Physics, 01 natural sciences, [SPI.MAT]Engineering Sciences [physics]/Materials, Surfaces, Coatings and Films, Corrosion, [PHYS.MECA.MEMA]Physics [physics]/Mechanics [physics]/Mechanics of materials [physics.class-ph], 020303 mechanical engineering & transports, 0203 mechanical engineering, Coating, Residual stress, 0103 physical sciences, Ultimate tensile strength, Materials Chemistry, engineering, Surface roughness, Composite material, Thermal spraying, Porosity, ComputingMilieux_MISCELLANEOUS
Abstract: This study aims at evaluating the effects of surface mechanical attrition treatment (SMAT) on mechanical properties and corrosion resistance of NiCrBSi coatings deposited by high-velocity oxygen-fuel (HVOF) spraying. The as-deposited coating has a typical HVOF-sprayed morphology with unmelted and deformed particles, associated with voids and porosities, whereas after SMAT, the affected zone morphology is more compact, without porosity or crack. The thickness of the affected zone varies from about 30 to 100 µm according to the SMAT parameters. The surface roughness is much lower for SMAT-treated coatings (from Ra = 6.8 µm to a Ra ≈ 2.3 µm). Whatever the SMAT parameters used in this work, the treated materials are harder compared to the as-deposited coating (from 6.6 to 7.6 GPa). They exhibit compressive residual stresses around − 360 MPa, while tensile stresses with an average value of 180 MPa were evaluated for the as-deposited coating. In addition, the treated coatings show better wear resistance as well as better corrosion resistance in a 3 wt.% NaCl solution. The better compromise in terms of SMAT parameters corresponds to amplitude of vibration of the SMAT sonotrode of 15 μm and SMAT duration of 810 s.
Published: 2020
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33. MICRO-SCALE STUDY OF RESIDUAL STRESSES IN CR2O3 COATINGS SPRAYED BY APS

Author: Cécile Langlade, Eric Bourillot, Franck Decroos, Manuel François, Geoffrey Darut, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée (LASMIS), Institut Charles Delaunay (ICD), and Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)-Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Forming processes, engineering.material, Microstructure, Microscopic scale, Characterization (materials science), Stress (mechanics), Coating, Residual stress, lcsh:TA1-2040, Microscopy, [SPI.MECA.MEMA]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Mechanics of materials [physics.class-ph], engineering, General Earth and Planetary Sciences, Composite material, coatings, chromium oxides, raman micro-spectroscopy, residual stress, scanning microwave microscopy, lcsh:Engineering (General). Civil engineering (General), General Environmental Science
Abstract: International audience; Whichever the application field, every material forming process generates residual stresses on the surface. While they are likely to enhance the aimed properties of the final mechanical part, these stresses may also drastically reduce them and result in early failures. Therefore, understanding the residual stress state remains a major challenge when coating complex parts, especially as most characterization methods at the microscopic scale involve specific sample preparation procedures which may affect the residual stresses field. This work investigates the residual stress state that exists in chromium oxide coatings deposited via Atmospheric Plasma Spray (APS), using two pioneering techniques featuring high spatial resolution: Scanning Microwave Microscopy and Raman Micro-Spectroscopy. The first technique combines the measurement of microwave electromagnetic capacities of a Vector Network Analyzer with the subnanometric resolution of an Atomic Force Microscope: it thus enables performing depth investigations at very accurately defined positions of the probe on the surface. The second technique relies on the principle of photons inelastic scattering and involves a laser beam aiming at the material sample: it allows a fine characterization of the microstructure as well as defects and stresses detection via molecular vibratory signatures. The investigation scale is limited here to a few cubic micrometers. Due to the highly localized scales of our investigations, which also depend on the device, the objective of our procedure required that the comparison should be made not on individual points but on definite mapped areas, every spot being analyzed and post-treated one after another, with optimum measuring parameters. Results have been correlated with XRD measurements to cross-check the average amount of stress observed over a wider area.
Published: 2020
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34. Facile One-Pot Synthesis of White Emitting Gold Nanocluster solutions composed of Red, Green and Blue Emitters

Author: Laureen Moreaud, Janak Prasad, Serges Mazères, Cécile Marcelot, Clothilde Comby-Zerbino, Rodolphe Antoine, Olivier Heintz, Erik Dujardin, Groupe NanoSciences (CEMES-GNS), Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Institut de pharmacologie et de biologie structurale (IPBS), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Spectrométrie des biomolécules et agrégats (SPECTROBIO), Institut Lumière Matière [Villeurbanne] (ILM), Université Claude Bernard Lyon 1 (UCBL), 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 Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and ANR-16-CE09-0027,HYBNAP,UNE PLATEFORME NANOPLASMONIQUE HYBRIDE EMETTEUR-COLLOÏDE METALLIQUE(2016)
Subjects: Materials Chemistry, mass spectroscopy, TEM, XPS, white emission, General Chemistry, fluorescence, [CHIM.MATE]Chemical Sciences/Material chemistry, gold clusters
Abstract: International audience; Gold nanoclusters (AuNC) have emerged as a new class of stable and biocompatible photo-emitters. While red emitting clusters comprising ca. 20-25 Au atoms are readily synthesized by several methods, smaller clusters with higher energy luminescence are much less commonly reported. Here, we report on a straightforward one-step synthesis of red, green, blue and violet emitting AuNC in mild conditions. Produced in pure ethylene glycol, the structural and optical properties of the AuNC are tuned by adding either aniline or indole. By combining high-resolution TEM, electrospray ionization mass spectrometry, X-ray photoelectron and photoluminescence spectroscopy, we identify Au6 (blue), Au11 (green) and Au22 (red) in solutions produced with aniline. This tricolor mixture produces a pure white luminescence under broadband excitation. The Au5 (violet) and Au7 (blue) produced with indole exhibit a large 27% quantum yield making them among the brightest blue emitting gold clusters. Importantly, when the AuNC are capped with a thiopegylated ligand shell bearing a terminal carboxylate, amine or biotin, they are made water soluble and stable while preserving intact their photo-physical characteristics. This work provides an easy access to robust emitters with tunable fluorescence and surface functionality for potential use in biolabelling, hyperspectral sensing or display technology.
Published: 2022
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35. Evolutive Optical Fibers Combining Oxide and Chalcogenide Glasses with Submicronic Polymer Structures

Author: Clément Strutynski, Moise Deroh, Rémi Bizot, Marianne Evrard, Frédéric Désévédavy, Grégory Gadret, Jean-Charles Jules, Claire-Hélène Brachais, Bertrand Kibler, Frédéric Smektala, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Conseil Régional de Bourgogne Franche-Comté, ANR-15-IDEX-0003,BFC,ISITE ' BFC(2015), ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017), and European Project: FEDER
Subjects: optical fiber, exposed-core fiber, polymer, multimaterial fibers, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic, General Medicine, glass, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience; Multimaterial optical fibers combining tellurite with chalcogenide glasses and featuring thin polymer structures are fabricated via the thermal drawing process. It is demonstrated that micrometric polyethersulfone films can be embedded within larger elongated tellurite/chalcogenide glass architectures. Taking advantage of the strong chemical reactivity contrasts which exist in the considered fiber geometries, a quasi-exposed-core waveguide is obtained by selective etching of the glass cladding. The potential of the postprocessed fiber structure is then assessed through evanescent-wave probing of liquids and numerical investigations are carried out to establish the device performances as function of selected optogeometric parameters. Those results open the way for the development of evolutive photonic objects benefiting from postdrawing processing of multimaterial fibers.
Published: 2022
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36. Interaction of two Rydberg atoms in the vicinity of an optical nanofibre

Author: E Stourm, M Lepers, J Robert, S Nic Chormaic, K Mølmer, E Brion, Laboratoire de physique des gaz et des plasmas (LPGP), Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Okinawa Institute of Science and Technology Graduate University, Niels Bohr Institute [Copenhagen] (NBI), Faculty of Science [Copenhagen], University of Copenhagen = Københavns Universitet (UCPH)-University of Copenhagen = Københavns Universitet (UCPH), Théorie (LCAR), Laboratoire Collisions Agrégats Réactivité (LCAR), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Fédération de recherche « Matière et interactions » (FeRMI), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), ANR-22-CE47-0011,1DOrder,Nouvelles approches pour l'interaction lumière-matière dans des ensembles atomiques ordonnés à une dimension(2022), and ANR-10-LABX-0039,PALM,Physics: Atoms, Light, Matter(2010)
Subjects: Quantum Physics, optical nanofibre, atom, formation, General Physics and Astronomy, FOS: Physical sciences, anisotropy, rotation, rubidium, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], van der Waals interaction, fibre, optical, interface, van der Waals, Quantum Physics (quant-ph), Rydberg atoms, symmetry
Abstract: We consider two rubidium atoms, prepared in the same S or P Rydberg states near an optical nanofibre. We determine the van der Waals interaction between them and identify novel features, including the reshaping of the interaction anisotropy and the formation of an interaction potential well near the nanofibre for P states. We attribute these phenomena to the breaking of the rotation symmetry around the interatomic axis due to the presence of the fibre. Our work constitutes an important step in the assessment of Rydberg atom-nanofibre quantum interfaces and devices., Comment: 28 pages, 18 figures
Published: 2022
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37. Taper à fibre optique microstructurée air/slice à dispersion modifiée pour une émission large bande et accordée autour de 2 µM par mélange à quatre ondes dégénérées

Author: Ahmedou, Sidi-Ely, Walter, Guillaume, Dauliat, Romain, Février, Sébastien, Herbuvaux, Jules, Valentin, Constance, Petit, Stéphane, Lhermite, Jérôme, Delagnes, Jean-Christophe, Labonte, Laurent, Tanzilli, Sébastien, Gérôme, Frédéric, Debord, Benoît, Benabid, Fetah, Millot, Guy, Roy, Philippe, Jamier, Raphael, Gerome, Frédéric, Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Nice (INPHYNI), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic
Abstract: International audience; Ce travail rapporte la conception, la fabrication et la caractérisation d'une fibre optique mircrostructurée air/silice effilée permettant une conversion de fréquence large bande par le processus de mélange à quatre ondes vers le moyen infra-rouge. Nous démontrons expérimentalement une bande de gain paramétrique de près de 100 nm. Une utilisation envisagée de ce taper réside dans le développement de sources laser femtosecondes.
Published: 2022

38. Heat treatment induced microstructural evolution, oxidation behavior and tribological properties of Fe-12Cr-9Ni-2Al steel (CX steel) prepared using selective laser melting

Author: Cheng Chang, Xingchen Yan, Zhaoyang Deng, Bingwen Lu, Rodolphe Bolot, Julien Gardan, Sihao Deng, Mahdi Chemkhi, Min Liu, Hanlin Liao, Laboratoire des Systèmes Mécaniques et d'Ingénierie Simultanée (LASMIS), Université de Technologie de Troyes (UTT), EPF [Troyes], Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Université de Bourgogne (UB), Université de Technologie de Belfort-Montbeliard (UTBM), Université de Caen Normandie (UNICAEN), and Normandie Université (NU)
Subjects: [SPI]Engineering Sciences [physics], Materials Chemistry, Surfaces and Interfaces, General Chemistry, Condensed Matter Physics, ComputingMilieux_MISCELLANEOUS, Surfaces, Coatings and Films, [SPI.MAT]Engineering Sciences [physics]/Materials
Abstract: International audience
Published: 2022
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39. Caractérisation du plasma LIBS : réflexions, bonnes pratiques et conséquences analytiques

Author: Rollin, Edouard, Picard, Jessica, Musset, Oivier, Legay, Guillaume, Sirven, Jean-Baptiste, CEA, Contributeur MAP, Laboratoire de développement Analytique Nucléaire Isotopique et Elémentaire (LANIE), Service d'études analytiques et de réactivité des surfaces (SEARS), Département de Physico-Chimie (DPC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Département de Physico-Chimie (DPC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, VALDUC (DAM/VALDUC), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS.PHYS.PHYS-OPTICS] Physics [physics]/Physics [physics]/Optics [physics.optics], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], [CHIM.ANAL] Chemical Sciences/Analytical chemistry, [CHIM.ANAL]Chemical Sciences/Analytical chemistry, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-PLASM-PH] Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], [PHYS.PHYS.PHYS-CHEM-PH]Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph], [PHYS.PHYS.PHYS-CHEM-PH] Physics [physics]/Physics [physics]/Chemical Physics [physics.chem-ph]
Abstract: International audience; La matrice d'un échantillon est définie par l'IUPAC (International Union of Pure and Applied Chemistry) comme les composants de l'échantillon autres que l'analyte. Et l'effet de matrice d'une technique analytique désignent alors l'effet combiné de tous les composants autres que l'analyte sur la mesure de sa quantité. Chose que l'on peut visualiser, par exemple, sur des droites d'étalonnage de pente différente pour différentes matrices. En LIBS, ces effets se traduisent physiquement par une interaction laser-surface et laser-plasma dépendant de la nature du matériau analysé, et induisant des variations de masse ablatée, de température et de densité électroniques d'un échantillon à un autre. Sous l'hypothèse de l'équilibre thermodynamique local, la caractérisation de ces trois paramètres permet donc en principe de s'affranchir de ces effets, et cette approche est à la base des méthodes de quantification sans étalonnage .Contrairement à la masse ablatée qui peut être mesurée en observant les cratères, la température et la densité électroniques sont généralement déterminées par des méthodes spectroscopiques. Les plus répandues sont, pour Te, le graphe de Boltzmann, pour Ne, l'équation de Saha-Boltzmann ou l'élargissement Stark. Ces méthodes reposent sur la mesure de certaines raies bien choisies. Les critères de choix sont connus (énergie d'excitation, absence d'interférence, d'auto-absorption…) mais pas toujours simples à mettre en pratique. Cependant, les négliger peut conduire à des biais significatifs sur le plan analytique. De plus, le choix qui en résulte dépend justement de la matrice. C'est pourquoi, alors que les effets de matrice sont très souvent cités dans la littérature sur la LIBS, il est très difficile de trouver des données comparables de température et densité électronique d'une matrice à l'autre.Cette présentation abordera trois questions, illustrées dans le cas des métaux. 1. Pourquoi s'attacher à caractériser précisément le plasma d'ablation laser ? 2. Quels sont les écueils à éviter ? 3. Quelle est l'étendue réelle des effets de matrice ? Pour y répondre, nous introduirons la méthode standardisée de caractérisation du plasma que nous avons mise au point, méthode basée sur un dépôt d'électrolyte en surface de l'échantillon
Published: 2022

40. Higher-order dispersion parameters management in highly nonlinear photonic crystal fibers for far-detuned frequency conversion

Author: Ahmedou, Sidi-Ely, Dauliat, Romain, Leconte, Baptiste, Février, Sébastien, Parriaux, Alexandre, Malfondet, Alix, Millot, Guy, Walter, Guillaume, Herbuvaux, Jules, Valentin, Constance, Petit, Stéphane, Lhermite, Jérôme, Delagnes, Jean-Christophe, Dalidet, Romain, Labonte, Laurent, Tanzilli, Sébastien, Gérôme, Frédéric, Debord, Benoît, Benabid, Fetah, Roy, Philippe, Jamier, Raphael, Gerome, Frédéric, Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Nice (INPHYNI), Université Nice Sophia Antipolis (1965 - 2019) (UNS), and COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic
Abstract: International audience; In this communication we present results dealing with the precise management of dispersion coefficients into two highly nonlinear fiber structures (a tapered PCF and an all-solid fiber) for far-detuned frequency conversion towards 2µm.
Published: 2022

41. From selective dissolution to crystal chemistry of brownmillerite in sulfate resisting cement

Author: Alexis Mériot, Marie‐Noëlle de Noirfontaine, Mireille Courtial, Laurent Izoret, Sandrine Tusseau‐Nenez, Mélanie Labourel, Sandrine Gauffinet, Frédéric Dunstetter, Laboratoire des Solides Irradiés (LSI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Syndicat Français de l'Industrie Cimentière (SFIC), Université d'Artois (UA), Physique de la Matière Condensée (PMC), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: brownmillerite, Portland cement, atomic structure, Materials Chemistry, Ceramics and Composites, microscopy, [CHIM.CRIS]Chemical Sciences/Cristallography, X-ray methods, ferrites
Abstract: International audience; The aim of this study is to extract brownmillerite from sulfate resisting Portland cement (SRPC) in order to determine its crystal chemistry and the effects of dissolution protocols. Brownmillerites (C4AF) from four SRPC were extracted and systematically studied by X-ray diffraction (XRD), electron probe microanalysis (EPMA) and X-ray fluorescence spectroscopy. Two extraction steps were used. The first is the SAM protocol that leaves a residue rich in ferrite, C3A and sulfates. Precipitated hydrated sulfate minerals are also observed for clinker with high molar SO3/Na2Oeq ratio. The second, developed in this paper, uses acetic acid (AcA) to dissolve C3A and sulfates. The Rietveld refinements showed that all brownmillerites of this study crystallize in Ibm2 space group. Two families of brownmillerite were identified by their aluminum content and cell parameters, related to the presence of C3A in the clinker. EPMA indicated that ferrites from SR0 and SR3 cements have Al/Fe ratios about 0.7 and 0.8-1.0 respectively. XRD allows to predict the (Al+Mg+Si)/Fe ratio in brownmillerite in good agreement with EPMA. The SAM protocol is the best way to study crystal chemistry of brownmillerite and the AcA protocol is recommended to dissolve sulfates and C3A for further reactivity studies.
Published: 2022
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42. Dispersion engineered tapered photonic crystal fiber for broadband and tuned 2 µm emission using degenerate four-wave mixing

Author: Ahmedou, Sidi-Ely, Dauliat, Romain, Février, Sébastien, Walter, Guillaume, Delagnes, Jean-Christophe, Labonte, Laurent, Tanzilli, Sébastien, Gérôme, Frédéric, Millot, Guy, Roy, Philippe, Jamier, Raphael, Gerome, Frédéric, Photonique Fibre et Sources Cohérentes (XLIM-PHOT), XLIM (XLIM), Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS)-Université de Limoges (UNILIM)-Centre National de la Recherche Scientifique (CNRS), Centre d'Etudes Lasers Intenses et Applications (CELIA), Université de Bordeaux (UB)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique de Nice (INPHYNI), Université Nice Sophia Antipolis (1965 - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [SPI.OPTI] Engineering Sciences [physics]/Optics / Photonic, [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic
Abstract: International audience; We numerically demonstrate a broadband parametric gain around 2 µm using a tapered Photonic crystal fiber.
Published: 2022

43. Morphology of metallic foams synthetized by plasma electrolysis deposition

Author: Julien Pinot, Ronan Botrel, Frederic Durut, Ludovic Reverdy, Laurent Pescayre, Vincent Vignal, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interactions Matériau-Procédé-Environnement [LRC DAM-VA-11-02] (LRC LIMPE), VALDUC (DAM/VALDUC), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS]Physics [physics], Condensed Matter Physics, Instrumentation, Electronic, Optical and Magnetic Materials
Abstract: International audience; The aim of our work is to understand the mechanism governing the growth of metallic foams synthetized by plasma electrolysis deposition. This paper reports the influence of the applied voltage on the morphology and microstructure of copper and gold foams. The evolution of strands morphology and size is investigated by field emission scanning electronic microscopy (FE-SEM). The role of the voltage in the growth of metallic foams is then discussed. Finally, the crystalline structure of the strands is determined by transmission electronic microscopy (TEM) and selected area electron diffraction.
Published: 2022
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44. Physical, chemical and mechanical evolution of the fuel-cladding interface in irradiated PWR fuel rods

Author: Schneider, Cloé, STAR, ABES, Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Caractérisation et d'étude des Propriétés des Combustibles (LCPC), Service d'Analyses, d'Elaboration, d'Expérientations et d'Examens des combustibles (SA3E), Département d'Etudes des Combustibles (DEC), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Département d'Etudes des Combustibles (DEC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Université Bourgogne Franche-Comté, Sébastien Chevalier, Jérôme Favergeon, Jérôme Sercombe, and Laurent Fayette
Subjects: [CHIM.MATE] Chemical Sciences/Material chemistry, Produit de fission, Combustible nucléaire, Alliage Zr, Mechanical properties, [CHIM.MATE]Chemical Sciences/Material chemistry, Interface, Caractérisations, Nuclear fuel, Propriétés mécaniques, Zirconia, Pellet-Cladding interaction, Zircone, Interactions pastille-Gaine, Zr alloys, Microstructure
Abstract: During the fuel irradiation in nuclear reactor, the fuel-cladding assembly is exposed to several irradiation-induced modifications. The fuel swelling coupled with cladding creep leads to a contact between the fuel and the cladding. The oxygen transport from the UO2 fuel to the zirconium layer induces progressively the Zr-cladding oxidation. This oxidation is initially local with the formation of islets. Then, with the increasing burnup of the fuel, it conducts to a continuous layer of about 8-µm thickness, localized at the fuel-cladding interface. At high burnup, zirconia growths anchor themselves in the periphery of the fuel (which is restructured) leading to pellet/cladding interlocking. The objective of this research work is to provide knowledge on: (1) pellet-cladding interaction at different scales, and (2) the mechanical properties of the pellet-cladding interface. In this objective, physicochemical characterizations by EPMA, FIB-SEM, TEM and EDS, as well as mechanical tests by nanoindentation at the pellet-cladding interface were carried out on fuel rods irradiated in French pressurized water reactors. The microstructure of the zirconia layer is complex because it is composed of different phases (tetragonal and monoclinic), grains of different size and shape (four microstructural zones identified), and is implanted by numerous fission products resulting from nuclear reactions in the fuel. These fission products can be dissolved in the zirconia matrix, condensed, or as metallic precipitates and bubbles, forming complex systems composed of an assembly of different elements. It has been established that U/Zr interdiffusion is limited to the scale of the layer of grains precisely located at the ZrO2|UO2 interface, and that it is necessary for the fuel in contact with the zirconia to be restructured so that the phenomenon of bonding at the pellet-cladding interface occurs. Finally, there was little variation in hardness and elastic modulus within the zirconia layer, despite the heterogeneous microstructure and composition of the layer., Au cours de sa vie en réacteur nucléaire, l'assemblage combustible est soumis à de nombreuses modifications induites par l'irradiation. En particulier, le gonflement des pastilles de combustible qui se produit parallèlement au fluage de la gaine en alliage de zirconium, conduit à la mise en contact de ces deux matériaux, entraînant alors l’oxydation de la face interne de la gaine. D’abord locale avec la formation d’îlots ponctuels, la zircone ainsi créée tend à recouvrir entièrement la surface interne de la gaine avec la durée d’irradiation, jusqu’à former une couche continue d’environ 8 µm d’épaisseur. À fort taux de combustion, des excroissances de zircone s’ancrent dans la périphérie du combustible (qui est sous une forme restructurée) conduisant à un accrochage pastille/gaine. Ces travaux de thèse ont pour objectif d’apporter des éléments de connaissances sur : (1) l’interaction entre le dioxyde d’uranium (combustible) et le zirconium (gaine) à différentes échelles, et (2) les propriétés mécaniques de l’interface pastille-gaine. Pour ce faire, des caractérisations physico-chimiques par microsonde, MEB-FIB, MET et EDX, ainsi que des essais mécaniques par nanoindentation au niveau de l’interface pastille-gaine ont été réalisées sur des crayons combustibles irradiés en réacteurs à eau pressurisée. La microstructure de la couche de zircone s’avère complexe car elle a la particularité d’être composée de différentes phases (quadratique et monoclinique), de grains de tailles et formes différentes (quatre zones microstructurelles identifiées), et d’être implantée par de nombreux produits de fission issus des réactions de désintégrations dans le combustible. Ces produits de fission se présentent sous formes dissous dans la matrice zircone, condensés, ou encore de précipités métalliques et de bulles, formant notamment des systèmes complexes composés d’un assemblage de différents éléments. Il a pu être établit qu’il existait une interdiffusion U/Zr limitée à l’échelle de la couche de grains précisément localisés à l’interface ZrO2|UO2, et qu’il était nécessaire que le combustible en contact avec la zircone soit restructuré pour que survienne le phénomène accrochage à l’interface pastille-gaine. Enfin, la dureté et le module d’élasticité varient peu au sein de la zircone, en dépit d’une microstructure et d’une composition hétérogène de la couche.
Published: 2022

45. High quality single crystal recrystallization of thin 4H-SiC films deposed by PVD techniques, a way for new emerging fields

Author: Usureau, Elise, Vuillermet, Enora, Lazar, Mihai, Andrieux, Aurore, Jacquemot, Alexandre, Lazar, Mihai, Lumière, nanomatériaux et nanotechnologies (L2n), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and MICROTEST
Subjects: [SPI]Engineering Sciences [physics], [SPI] Engineering Sciences [physics]
Abstract: International audience
Published: 2022

46. Quantum optimal control in quantum technologies. Strategic report on current status, visions and goals for research in Europe

Author: Koch, Christiane, Boscain, Ugo, Calarco, Tommaso, Dirr, Gunther, Filipp, Stefan, Glaser, Steffen, Kosloff, Ronnie, Montangero, Simone, Schulte-Herbrüggen, Thomas, Sugny, Dominique, Wilhelm, Frank K., Freie Universität Berlin, Sorbonne Université (SU), Centre National de la Recherche Scientifique (CNRS), Laboratoire Jacques-Louis Lions (LJLL (UMR_7598)), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Control And GEometry (CaGE ), Inria de Paris, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Laboratoire Jacques-Louis Lions (LJLL (UMR_7598)), Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), Peter Grünberg Institut (PGI), University of Würzburg = Universität Würzburg, Technische Universität Munchen - Université Technique de Munich [Munich, Allemagne] (TUM), The Hebrew University of Jerusalem (HUJ), Università degli Studi di Padova = University of Padua (Unipd), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Saarland University [Saarbrücken], Financial support from European Union’s Horizon 2020 research and innovation programme under the MarieSk lodowska-Curie grant agreement Nr. 765267 (QuSCo) is gratefully acknowledged. SF, SJG and TSH would also like to acknowledge the Munich Quantum Valley (MQV) e.V., München, Germany., and European Project: 765267,H2020-EU.1.3.1.,QuSCo(2017)
Subjects: Controllability, [PHYS]Physics [physics], Quantum Physics, Quantum sensing, Quantum technologies, FOS: Physical sciences, TheoryofComputation_GENERAL, Quantum control, Quantum computing, Optimal control, ComputerSystemsOrganization_MISCELLANEOUS, ddc:530, [MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC], Quantum simulation, [MATH]Mathematics [math], Quantum Physics (quant-ph)
Abstract: Quantum optimal control, a toolbox for devising and implementing the shapes of external fields that accomplish given tasks in the operation of a quantum device in the best way possible, has evolved into one of the cornerstones for enabling quantum technologies. The last few years have seen a rapid evolution and expansion of the field. We review here recent progress in our understanding of the controllability of open quantum systems and in the development and application of quantum control techniques to quantum technologies. We also address key challenges and sketch a roadmap for future developments., this is a living document - we welcome feedback and discussion
Published: 2022
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47. Tailoring wavelength and emitter-orientation dependent propagation of single photons in silicon nanowires

Author: Mélodie Humbert, Peter R. Wiecha, Gérard Colas des Francs, Xiao Yu, Nicolas Mallet, Aurélie Lecestre, Guilhem Larrieu, Vincent Larrey, Frank Fournel, Laurence Ressier, Christian Girard, Vincent Paillard, Aurélien Cuche, Centre d'élaboration de matériaux et d'études structurales (CEMES), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physique et chimie des nano-objets (LPCNO), Université de Toulouse (UT)-Fédération de recherche « Matière et interactions » (FeRMI), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Équipe Matériaux et Procédés pour la Nanoélectronique (LAAS-MPN), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Service Techniques et Équipements Appliqués à la Microélectronique (LAAS-TEAM), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), ANR-11-IDEX-0002,UNITI,Université Fédérale de Toulouse(2011), ANR-10-LABX-0037,NEXT,Nano, EXtreme Measurements & Theory(2010), ANR-19-CE24-0026,HiLight,Nanostructures diélectriques à haut indice pour le contrôle de l'émission et de la propagation de la lumière(2019), and ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017)
Subjects: [PHYS.PHYS.PHYS-COMP-PH]Physics [physics]/Physics [physics]/Computational Physics [physics.comp-ph], [PHYS.PHYS.PHYS-OPTICS]Physics [physics]/Physics [physics]/Optics [physics.optics], nanowire, General Physics and Astronomy, Physics::Optics, silicon, waveguide, nitrogen-vacancy center, Quantum nano-optics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract: International audience; Quantum nano-optics aims at transposing the concepts of quantum optics at the nanoscale. In this context, nitrogen-vacancy color centers in nanodiamonds are particularly interesting sources as they emit single photons one by one with a broad spectral distribution between 600 and 800 nm. We deposit such quantum emitters at the extremities of silicon nanowires and analyze the effects of this interaction via spectrally resolved confocal microscopy. We demonstrate that the single photon emission can be guided over several microns under conservation of their quantum statistics, and with efficiencies of up to 15 %.n We show that the silicon nanowires can be used as spectral filters for the quantum emission. Numerical simulations are in very good agreement with experiments, and indicate that the modal landscape of these nano-waveguides and the according coupling efficiencies with quantum emitters can be designed such that only light from emitters of specific orientations is efficiently guided through the nanowire, enabling a unique quantum state selectivity at a micrometer length scale. Our work opens the door to a genuine modal control of single photon transfer in subwavelength nanowaveguides, paving the way to future fundamental studies and towards integrated and multi-wavelength photonics applications in quantum nano-optics.
Published: 2022
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48. Tunable sensitivity of a biosensor by strain modulation of a gap between gold dimers

Author: Lamaze, Florian, d'Orsonnens, William, Hmima, Abdelhamid, Proust, Julien, Giraudet, Louis, Finot, Eric, Maurer, Thomas, D'ORSONNENS, William, Lumière, nanomatériaux et nanotechnologies (L2n), Université de Technologie de Troyes (UTT)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Recherche en Nanosciences - EA 4682 (LRN), Université de Reims Champagne-Ardenne (URCA)-SFR CAP Santé (Champagne-Ardenne Picardie Santé), Université de Reims Champagne-Ardenne (URCA)-Université de Reims Champagne-Ardenne (URCA)-SFR Condorcet, Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: [PHYS]Physics [physics], ComputingMilieux_MISCELLANEOUS, [PHYS] Physics [physics]
Abstract: International audience
Published: 2022

49. Phase-space distributions of Bose–Einstein condensates in an optical lattice: optimal shaping and reconstruction

Author: N Dupont, F Arrouas, L Gabardos, N Ombredane, J Billy, B Peaudecerf, D Sugny, D Guéry-Odelin, Atomes Froids (LCAR), Laboratoire Collisions Agrégats Réactivité (LCAR), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Fédération de recherche « Matière et interactions » (FeRMI), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum Physics, [PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas], [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], Quantum Gases (cond-mat.quant-gas), FOS: Physical sciences, General Physics and Astronomy, Condensed Matter - Quantum Gases, Quantum Physics (quant-ph)
Abstract: We apply quantum optimal control to shape the phase-space distribution of Bose-Einstein condensates in a one-dimensional optical lattice. By a time-dependent modulation of the lattice position, determined from optimal control theory, we prepare, in the phase space of each lattice site, translated and squeezed Gaussian states, and superpositions of Gaussian states. Complete reconstruction of these non-trivial states is performed through a maximum likelihood state tomography. As a practical application of our method to quantum simulations, we initialize the atomic wavefunction in an optimal Floquet-state superposition to enhance dynamical tunneling signals., Comment: 10 pages, 9 figures
Published: 2023
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50. Simple phasor-based deep neural network for fluorescence lifetime imaging microscopy

Author: Héliot, Laurent, Leray, Aymeric, Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523 (PhLAM), Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Bourgogne (UB), Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), Université de Technologie de Belfort-Montbeliard (UTBM)-Université de Bourgogne (UB)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), and ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017)
Subjects: Microscopy, Multidisciplinary, [PHYS.PHYS.PHYS-BIO-PH]Physics [physics]/Physics [physics]/Biological Physics [physics.bio-ph], Science, Medicine, Imaging and sensing, Biological fluorescence, Article
Abstract: Fluorescence lifetime imaging microscopy (FLIM) is a powerful technique to probe the molecular environment of fluorophores. The analysis of FLIM images is usually performed with time consuming fitting methods. For accelerating this analysis, sophisticated deep learning architectures based on convolutional neural networks have been developed for restrained lifetime ranges but they require long training time. In this work, we present a simple neural network formed only with fully connected layers able to analyze fluorescence lifetime images. It is based on the reduction of high dimensional fluorescence intensity temporal decays into four parameters which are the phasor coordinates, the mean and amplitude-weighted lifetimes. This network called Phasor-Net has been applied for a time domain FLIM system excited with an 80 MHz laser repetition frequency, with negligible jitter and afterpulsing. Due to the restricted time interval of 12.5 ns, the training range of the lifetimes was limited between 0.2 and 3.0 ns; and the total photon number was lower than 106, as encountered in live cell imaging. From simulated biexponential decays, we demonstrate that Phasor-Net is more precise and less biased than standard fitting methods. We demonstrate also that this simple architecture gives almost comparable performance than those obtained from more sophisticated networks but with a faster training process (15 min instead of 30 min). We finally apply successfully our method to determine biexponential decays parameters for FLIM experiments in living cells expressing EGFP linked to mCherry and fused to a plasma membrane protein.
Published: 2021
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