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3. Interface observation of heat-treated Co/Mo2C multilayers

Author

Yuan, Yanyan, Guen, Karine Le, André, Jean-Michel, Mény, Christian, Ulhaq, Corinne, Galtayries, Anouk, Zhu, Jingtao, Wang, Zhanshan, and Jonnard, Philippe

Subjects
Condensed Matter - Materials Science
Abstract

We study the interface evolution of a series of periodic Co/Mo2C multilayers as a function of the annealing temperature up to 600{\textdegree}C. Different complementary techniques are implemented to get information on the phenomenon taking place at the interfaces of the stack. The periodical structure of Co/Mo2C multilayer is proven by Time-of-flight secondary ion mass spectrometry (ToF-SIMS) depth profiles which demonstrate the formation of an oxide layer at both air/stack and stack/substrate interfaces. From Nuclear magnetic resonance (NMR) spectra, we observed the intermixing phenomenon of Co and C atoms for the as-deposited sample, and then at annealing temperature above 300{\textdegree}C Co and C atoms separate from their mixed regions. Comparison of NMR results between Co/Mo 2 C and Co/C references confirms this phenomenon. This is in agreement with x-ray emission spectroscopy (XES) measurements. Furthermore the calculation of the Co-C, Co-Mo and Mo-C mixing enthalpy using Miedema's model gives a proof of the demixing of Co and C atoms present within the stacks above 300{\textdegree}C. From the transmission electron microscopy (TEM) analysis, we found the presence of some crystallites within the as-deposited sample as well as the mainly amorphous nature of all layers. This is confirmed using x-ray diffraction (XRD) patterns which also demonstrate the growth of crystallites induced upon annealing., Comment: Published in Applied Surface Science 331, 8-16 (2015). http://dx.doi.org/10.1016/j.apsusc.2014.12.055

Published
2015
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6. Preface

Author

Graur Martin, Irina, primary, Galtayries, Anouk, additional, Bersier, Jean-Louis, additional, Bittencourt, Carla, additional, and Jousten, Karl, additional

Published
2023
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19. Preface

Author

Bailly, Aude, primary, Djurado, Elisabeth, additional, Felici, Roberto, additional, Galtayries, Anouk, additional, and Renault, Olivier, additional

Published
2018
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21. Optical properties and energy levels of Ce3+ in lutetium pyrosilicate scintillator crystal.

Author

Pidol, Ludivine, Viana, Bruno, Kahn-Harari, Andrée, Galtayries, Anouk, Bessière, Aurélie, and Dorenbos, Pieter

Subjects
CERIUM, LUTETIUM, SCINTILLATORS, LUMINESCENCE, EMISSION spectroscopy, CONDUCTION bands
Abstract

Cerium doped lutetium pyro-silicate Ce3+:Lu2Si2O7 (LPS) is an inorganic scintillator that displays particularly promising performance. The spectroscopic properties of pure and Ce3+-doped Lu2Si2O7 are investigated. X-ray-excited luminescence, time-resolved excitation and emission spectroscopy, as well as decay time spectra are presented. For better understanding of the scintillation mechanism, several approaches were undertaken to locate the Ce3+ energy levels relative to levels of LPS host. To estimate the energy position of Ce3+ 4f levels with respect to the valence band, x-ray photoemission spectroscopy (XPS) was used. Scintillation properties of LPS: Ce are explained in terms of the relative positions of Ce3+-5d levels and the conduction band. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Published
2004
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24. Optical properties and energy levels of Ce(super 3+) in lutetium pyrosilicate scintillator crystal

Author

Pidol, Ludivine, Viana, Bruno, Kahn-Harari, Galtayries, Anouk, Bessiere, Aurelie, and Dorenbos, Pieter

Subjects
Silicon compounds -- Research, Silicon compounds -- Optical properties, Cesium -- Research, Cesium -- Optical properties, Physics
Abstract

The spectroscopic properties of pure and Ce(super 3+) -doped Lu2Si2O7 (LPS) are investigated. Scintillation properties of LPS:Ce are explained in terms of the relative positions of Ce(super 3+) -5d levels and the conduction band.

Published
2004

25. Engineering the magnetic coupling and anisotropy at the molecule–magnetic surface interface in molecular spintronic devices

Author

Campbell, Victoria E., primary, Tonelli, Monica, additional, Cimatti, Irene, additional, Moussy, Jean-Baptiste, additional, Tortech, Ludovic, additional, Dappe, Yannick J., additional, Rivière, Eric, additional, Guillot, Régis, additional, Delprat, Sophie, additional, Mattana, Richard, additional, Seneor, Pierre, additional, Ohresser, Philippe, additional, Choueikani, Fadi, additional, Otero, Edwige, additional, Koprowiak, Florian, additional, Chilkuri, Vijay Gopal, additional, Suaud, Nicolas, additional, Guihéry, Nathalie, additional, Galtayries, Anouk, additional, Miserque, Frederic, additional, Arrio, Marie-Anne, additional, Sainctavit, Philippe, additional, and Mallah, Talal, additional

Published
2016
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26. C-C bond formation strategy through palladium Ecocatalysis: from palladium recycling to innovative catalysts

Author

Garel, Claire, Renard, Brice-Loïc, Escande, Vincent, Galtayries, Anouk, Hesemann, Peter, Grison, Claude, and Deyris, Pierre-Alexandre

Subjects
[SDE.BE] Environmental Sciences/Biodiversity and Ecology, [CHIM.ANAL] Chemical Sciences/Analytical chemistry, [CHIM.CATA] Chemical Sciences/Catalysis, [SDE.ES] Environmental Sciences/Environmental and Society, [CHIM.ORGA] Chemical Sciences/Organic chemistry
Published
2015

27. C-C bond formation strategy throught palladium Ecocatalysis:insights from structural studies and synthetic potential

Author

Garel, Claire, Renard, Brice-Loïc, Escande , Vincent, Galtayries, Anouk, Hesemann, Peter, Grison, Claude, and Deyris, Pierre-Alexandre

Subjects
[SDE.BE] Environmental Sciences/Biodiversity and Ecology, [CHIM.ANAL] Chemical Sciences/Analytical chemistry, [CHIM.CATA] Chemical Sciences/Catalysis, [SDE.ES] Environmental Sciences/Environmental and Society, [CHIM.ORGA] Chemical Sciences/Organic chemistry
Published
2015

28. Study of iron sulphides origin in archeological artefacts by determination of sulphur isotopic ratio

Author

Grousset, Sophie, Mercier-Bion, Florence, Dauzères, Alexandre, Crusset, Didier, Raimbault, Louis, Galtayries, Anouk, Gallien, Jean-Paul, Dillmann, Philippe, Laboratoire Archéomatériaux et Prévision de l'Altération (LAPA - 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-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-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-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Institut de Recherches sur les Archéomatériaux (IRAMAT), Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne-Centre National de la Recherche Scientifique (CNRS), Institut de Radioprotection et de Sûreté Nucléaire (IRSN), Agence Nationale pour la Gestion des Déchets Radioactifs (ANDRA), Laboratoire de Physico-Chimie des Surfaces (LPCS), Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), 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), and Université de Technologie de Belfort-Montbeliard (UTBM)-Université d'Orléans (UO)-Université Bordeaux Montaigne (UBM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[CHIM.MATE]Chemical Sciences/Material chemistry, ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2014

29. Grafting of an aluminium surface with organic layers

Author

Berisha, Avni, primary, Hazimeh, Hassan, additional, Galtayries, Anouk, additional, Decorse, Philippe, additional, Kanoufi, Frédéric, additional, Combellas, Catherine, additional, Pinson, Jean, additional, and Podvorica, Fetah I., additional

Published
2016
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31. Interface observation of heat-treated Co/Mo2C multilayers

Author

Yuan, Yanyan, primary, Le Guen, Karine, additional, André, Jean-Michel, additional, Mény, Christian, additional, Ulhaq, Corinne, additional, Galtayries, Anouk, additional, Zhu, Jingtao, additional, Wang, Zhanshan, additional, and Jonnard, Philippe, additional

Published
2015
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34. Functionalization of Aluminum Nanoparticles Using a Combination of Aryl Diazonium Salt Chemistry and Iniferter Method

Author

Atmane, Yasmine Aït, primary, Sicard, Lorette, additional, Lamouri, Aazdine, additional, Pinson, Jean, additional, Sicard, Mickaël, additional, Masson, Christian, additional, Nowak, Sophie, additional, Decorse, Philippe, additional, Piquemal, Jean-Yves, additional, Galtayries, Anouk, additional, and Mangeney, Claire, additional

Published
2013
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50. Synthesis of Photocatalytic Titanium Dioxide and Nitrogen Doped Titanium Dioxide Coatings Using an Atmospheric Dielectric Barrier Discharge

Author

Chen, Qianqian, Reniers, François, Buess Herman, Claudine, Visart de Bocarmé, Thierry, Godet, Stéphane, SNYDERS, Rony UMONS, and Galtayries, Anouk

Subjects
Atmospheric Dielectric Barrier Discharge, Titanium Dioxide Coatings, Chimie des surfaces et des interfaces, Nitrogen Doped Titanium Dioxide Coatings, Photocatalytic, Sciences exactes et naturelles
Abstract

In this thesis, we focused on understanding the synthesis of titanium dioxide (TiO2) films and nitrogen doped TiO2 films using an atmospheric pressure Dielectric Barrier Discharge (DBD). The first part of the work was dedicated to the deposition of TiO2 films by cold plasma DBD with titanium tetraisopropoxide as precursor in a single-step process at room temperature. The deposition rate was about 70 nm·min-1. The photocatalytic degradation rate for the degradation of methylene blue (MB) under ultra violet (UV) irradiation of the TiO2 film after annealing was close to a reference anatase TiO2 spin coated film. Moreover, the TiO2 films showed a good photocatalytic stability. The second part of the study focused on the optimization and the understanding of the effect of the plasma parameters (gas flow rate and power) on the morphology of the TiO2 films and on the investigation of the deposition mechanisms. The morphology of the film changed from granular to compact film by either increasing the total flow rate or decreasing the plasma power. In other words, adapting the energy density in the plasma allowed the control of the morphology of the TiO2 films. To our knowledge, it was the first time that the energy density parameters of the plasma were used to control the morphology of TiO2 films. The photocatalytic degradation rate for the degradation of MB under UV irradiation of the annealed TiO2 film turned out to be about 2 and 15 times higher than the one of the commercial TiO2 film and the as-deposited TiO2 films, respectively. In order to extend the light utilization to the visible light range, TiO2 films were doped with nitrogen using a room temperature argon/ammonia plasma discharge. XPS and SIMS results confirmed that the nitrogen has been incorporated in the TiO2 lattice mostly in Ti-N state. This was further confirmed by Raman spectroscopy and XRD. The plasma properties and the doping mechanism were studied by Optical Emission Spectroscopy. It is suggested that the NH radicals played a key role in the doping of TiO2. The concentration of nitrogen in the N-TiO2 coatings could be tuned by adapting the ratio of NH3 in the plasma or the plasma power. The band gap of our N-TiO2 coatings is lower than the one of undoped TiO2 coating. The photocatalytic degradation rate for N-TiO2 coating was more than 4 times higher than the one of the undoped TiO2 coating., Doctorat en Sciences, info:eu-repo/semantics/nonPublished

Published
2018

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