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Plasma assisted diffusion in porous materials: Experiments, modeling and applications

Abstract : 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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Contributor : Pascal Brault <>
Submitted on : Tuesday, April 17, 2012 - 11:08:05 PM
Last modification on : Tuesday, December 8, 2020 - 3:38:36 AM
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Pascal Brault, Jean-Marc Bauchire, Francois James, Christophe Josserand. Plasma assisted diffusion in porous materials: Experiments, modeling and applications. Defect and Diffusion Forum, Trans Tech Publications, 2012, 323-325, pp.387-391. ⟨10.4028/⟩. ⟨hal-00688555⟩



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