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2014

Articles:

Wang, Y., Ghanbaja, J., SOLDERA, F., Boulet, P., Horwat, D., MUECKLICH, F. and Pierson, J. F.
ACTA MATERIALIA, 76:207-212
2014
ISSN: 1359-6454

Equipe: Centre de Compétences : X-Gamma rayons X et spectroscopie

Derkaoui, N., Rond, C., Gries, T., Henrion, G. and Gicquel, A.
Journal of Physics D: Applied Physics, 47:205201
2014

Resume: The electron temperature and electron density are measured in a microwave (MW) plasma-assisted chemical vapour diamond deposition reactor for different experimental conditions by varying the substrate temperature, methane content and MW power density. Optical emission spectroscopy (OES) and MW interferometry are used to probe the discharge generated in a stainless steel resonant cavity excited at a frequency of 2.45 GHz. Changing the substrate temperature from 630 to 900 ?C does not show any significant influence on the electron temperature or on the electron density. Increasing the methane content from 0 to 10% does not lead to any modification of the electron temperature or density. However between 10% and 20% CH, a decrease of the electron density is observed which may be attributed to soot particle formation. The electron density increases in the range of (1.2-10) x 1011 cm-3 from moderate power density conditions (50 hPa/1000 W) to high power density conditions (250 hPa/3500 W). OES measurements show that the electron temperature exhibits a flat axial profile in the plasma bulk and ranges from 14 000K at (25 hPa/600 W) to 10 500K at (400 hPa/3000 W).

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Escande, Vincent, Garoux, Laetitia, Grison, Claire, Thillier, Yann, Debart, Francoise, Vasseur, Jean-Jacques, Boulanger, Clothilde and Grison, Claude
Applied Catalysis., B, 146:279-288
2014

Resume: Metallophyte plants derived from phytoextn. are used as starting materials to prep. novel polymetallic catalysts. Polymetallic catalyst activity is used in many Lewis acid catalyzed reactions according to the polymetallic catalyst prepn. The synergetic catalysis of these systems leads to efficient syntheses of complex biomols. such as dihydropyrimidinone, 5'-capped DNA and RNA, and glycosyl aminoacid. These new polymetallic catalysts also bring new possibilities in Green Catalysis, that we named "Ecol. Catalysis". [on SciFinder(R)]

Equipe: Département CP2S : Chimie et électrochimie des matériaux

Margueron, S., Ropers, S., Genty, F., Bartasyte, A. and Belmonte, T.
Materials Chemistry and Physics, 147:623-628
2014

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Mangin, S., Gottwald, M., Lambert, C.-H., Steil, D., Uhlír, V., Pang, L., Hehn, M., Alebrand, S., Cinchetti, M., Malinowski, G., Fainman, Y., Aeschlimann, M. and Fullerton, E.E.
Nature Materials, 13(3):286-292
2014

Equipe: Département P2M : Nanomagnétisme et Electronique de Spin

Barwe, B., Stein, A., E. Cibulka, O., Ghanbaja, J., Belmonte, T. and Benedikt, J.
Plasma Processes and Polymers, in press
2014

Resume: Silicon nanostructures are synthesized with a DC atmospheric pressure microplasma jet using an Ar/SiH4/H2 gas mixture. The plasma is characterized by OES and imaged using an EMCCD camera. The effect of hydrogen admixture to the formed structures is studied by transmission electron microscopy. Under specific conditions, crystalline silicon nanoparticles grow in an amorphous matrix investigated by electron energy loss spectroscopy. As-grown silicon nanoparticles are collected in ethanol for dynamic light scattering and photoluminescence measurements. The size distribution peaks at 4â??nm. The silicon nanocrystals exhibit roomtemperature photoluminescence that peaks at ~415 and ~465 nm

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Kuete Saa, D., Cardoso, R.P., Kosior, F., Altaweel, A., Gries, T., Laminsi, S. and Belmonte, T.
Surface and Coatings Technology, 255:3-7
2014

Equipe: Département CP2S : Expériences et Simulations des Plasmas Réactifs - Interaction plasma-surface et Traitement des Surfaces ESPRITS

Saa, D. Kuete, Cardoso, R. P., Kosior, F., Al Taweel, A., Gries, T., Laminsi, S. and Belmonte, T.
SURFACE & COATINGS TECHNOLOGY, 255:3-7 Belmonte, T (Reprint Author), Univ Lorraine, Inst Jean Lamour, UMR CNRS 7198, F-54042 Nancy, France. Saa, D. Kuete; Kosior, F.; Al Taweel, A.; Gries, T.; Belmonte, T., Univ Lorraine, Inst Jean Lamour, UMR CNRS 7198, F-54042 Nancy, France. Saa, D. Kuete; Laminsi, S., Univ Yaounde I, Lab Chim Minerale, Yaounde 812, Cameroon. Cardoso, R. P., Univ Fed Parana, BR-81531990 Curitiba, Parana, Brazil. Gries, T.; Belmonte, T., CNRS, Inst Jean Lamour, UMR CNRS 7198, F-54042 Nancy, France.
2014
ISSN: 0257-8972

Mots clefs: RuO2; Nanostructuration; Localized growth; Micro-plasma; Afterglow

Resume: Various ruthenium dioxide nanostructures were grown locally by the oxidation of ruthenium samples with an Ar-O-2 microwave micro-afterglow operated at atmospheric pressure. A special attention was paid to the distribution of the surface temperature of the sample which evolves between 530 K and 820 K. Whatever the treatment time, the temperature and the gas composition set within the studied ranges, a general nanostructure, made of lamellae separated by 20-50 nm, is found. When the temperature rises, localized nano-sea urchins, nanotubes with square sections, nano-needles, and more complex structures are found spread over the surface. Treated surfaces were characterized by different surface diagnostics (SEM, XRD, SIMS, etc.) Finally, a growth mechanism is proposed emphasizing the role of emerging defects and stress on the appearance of localized nanostructures. (C) 2013 Elsevier B.V. All rights reserved.

Equipe: Centre de Compétences : ERMIONE informatique et calcul

Geandier, G., Faurie, D., Renault, P.-O., Thiaudière, D. and Le Bourhis, E.
Journal of Applied Crystallography, 47:181-187
2014

Equipe: Département SI2M : Microstructures et Contraintes

Geandier, G., Dehmas, M., Mourot, M., Aeby-Gautier, E., Denis, S., Martin, O. and Karnatak, N.
Journal of heat treatments and materials, 69:54--59
2014

Equipe: Département SI2M : Microstructures et Contraintes

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