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Université d'Orléans |  |
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Université d'Orléans | |
| HAL : hal-00688555, version 1 |
| DOI : 10.4028/www.scientific.net/DDF.323-325.387 |
| Fiche détaillée |  Récupérer au format |
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| Defect and Diffusion Forum 323-325 (2012) 387-391 |
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| Plasma assisted diffusion in porous materials: Experiments, modeling and applications |
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| Pascal Brault 1Jean-Marc Bauchire 1 |
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| (12/04/2012) |
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| Plasma sputtering deposition of platinum on porous substrates is a relevant way for building high performance catalytic thin films. The knowledge and control of platinum density adsorbed in the porous medium, during deposition, are of primary importance. We show that the experimental concentration depth profiles originate from a superdiffusion phenomenon. Moreover experimental results are well described by a classical porous-fractal diffusion model, for which diffusion coefficient is also time-dependent, even if such a model does not include the proper physical mechanisms. |
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| 1 : | Groupe de recherches sur l'énergétique des milieux ionisés (GREMI) |
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CNRS : UMR6606 – Université d'Orléans |
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| 2 : | Mathématiques - Analyse, Probabilités, Modélisation - Orléans (MAPMO) |
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Université d'Orléans – CNRS : UMR7349 |
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| 3 : | Institut Jean Le Rond d'Alembert (IJLRA) |
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CNRS : UMR7190 – Université Pierre et Marie Curie [UPMC] - Paris VI |
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| Domaine | : | Sciences de l'ingénieur/Plasmas |
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| Anomalous diffusion equation – plasma sputtering deposition – AAO template – porous carbon – random stacking – catalytic film – fuel cell |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00688555, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00688555 | |
| oai:hal.archives-ouvertes.fr:hal-00688555 | |
| Contributeur : Pascal Brault | |
| Soumis le : Mardi 17 Avril 2012, 23:08:05 | |
| Dernière modification le : Mercredi 18 Avril 2012, 10:04:10 | |
