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15 results on '"Picaud, Fabien"'

5. Theoretical study of the Ni growth on Pt stepped surfaces

Author

Garbouj Hedi, Ramseyer Christophe, Essolaani Wafa, Desjonquères Marie-Catherine, Picaud Fabien, Said Moncef, Spanjaard Daniel, Université de Monastir - University of Monastir (UM), Laboratoire de Physique Moléculaire (UMR 6624) (LPM), Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Service de Physique et de Chimie des Surfaces et Interfaces (SPCSI), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), and Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Diffusion and migration, Monte Carlo method, Alloy, chemistry.chemical_element, Second moment of area, Growth, 02 engineering and technology, engineering.material, Kinetic energy, 01 natural sciences, Molecular physics, Surface energy, Computational chemistry, 0103 physical sciences, Materials Chemistry, Diffusion (business), 010306 general physics, [PHYS]Physics [physics], Chemistry, Interaction model, Monte-Carlo simulations, Surfaces and Interfaces, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Surfaces, Coatings and Films, Nickel, engineering, Semi-empirical models and model calculations, Construction and use of effective interatomic interactions, 0210 nano-technology, Computer simulations
Abstract

International audience; We have investigated the growth of Ni on Pt stepped surfaces with (1 1 1) terraces by means of potentials derived from the second moment approximation in a tight-binding model. The activation energies associated to these processes are determined. The Schwoebel barriers of Ni atoms descending steps of Pt stepped surfaces are calculated for different kinds of straight steps (A and B steps) differing by the orientation of the ledge. In addition, we study the diffusion of Ni adatoms at fcc or hcp sites in the presence of small adislands on the terraces, in the vicinity of the A and B steps. We show that a good estimate of the potential wells and diffusion barriers could be given by introducing a lateral effective pair interaction model, the interactions extending up to the next nearest neighbors. Finally, we have carried out Kinetic Monte-Carlo simulations to investigate the Ni wire formation at Pt step edges and the influence of the exchange processes in the alloy formation.

Published
2009

6. Ionic Transport through Uncharged Nanopores

Author

Balme, Sébastien, primary, Picaud, Fabien, additional, Manghi, Manoel, additional, Palmeri, John, additional, Bechelany, Mikhael, additional, Balanzat, Emmanuel, additional, and Janot, Jean-Marc, additional

Published
2016
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7. Carbon nanotube – Protamine hybrid: Evaluation of DNA cell penetration

Author

Caoduro, Cécile, primary, Kacem, Raoudha, additional, Boukari, Khaoula, additional, Picaud, Fabien, additional, Brachais, Claire-Hélène, additional, Monchaud, David, additional, Borg, Christophe, additional, Boulahdour, Hatem, additional, Gharbi, Tijani, additional, Delage-Mourroux, Régis, additional, Hervouet, Eric, additional, and Pudlo, Marc, additional

Published
2016
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