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Palladium nanoparticles deposition via precipitation: a new method to functionalize macroporous silicon

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Scheen, Gilles [UCL] Bassu, Margherita [Max Planck Institute for Biophysical Chemistry, Göttingen/Germany] Douchamps, Antoine [UCL] Zhang, Chao [FUCaM] Debliquy, Marc [FUCaM] Francis, Laurent [UCL]

We present an original two-step method for the deposition via precipitation of Pd nanoparticles into macroporous silicon. The method consists in immersing a macroporous silicon sample in a PdCl2/DMSO solution and then in annealing the sample at a high temperature. The impact of composition and concentration of the solution and annealing time on the nanoparticle characteristics is investigated. This method is compared to electroless plating, which is a standard method for the deposition of Pd nanoparticles. Scanning electron microscopy and computerized image processing are used to evaluate size, shape, surface density and deposition homogeneity of the Pd nanoparticles on the pore walls. Energy-dispersive x-ray spectroscopy (EDX) and x-ray photoelectron spectroscopy (XPS) analyses are used to evaluate the composition of the deposited nanoparticles. In contrast to electroless plating, the proposed method leads to homogeneously distributed Pd nanoparticles along the macropores depth with a surface density that increases proportionally with the PdCl2 concentration. Moreover EDX and XPS analysis showed that the nanoparticles are composed of Pd in its metallic state, while nanoparticles deposited by electroless plating are composed of both metallic Pd and PdOx.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2014
Language Anglais
Journal information "Science and Technology of Advanced Materials" - Vol. 15, no.065002, p. 11 (12/11/2014)
Peer reviewed yes
Publisher Institute of Physics Publishing Ltd. ((United Kingdom) Bristol)
issn 1468-6996
e-issn 1878-5514
Publication status Publié
Affiliation UCL - SST/ICTM/ELEN - Pôle en ingénierie électrique
Keywords Functionalization ; Macroporous silicon ; Palladium nanoparticles
Links
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Bibliographic reference Scheen, Gilles ; Bassu, Margherita ; Douchamps, Antoine ; Zhang, Chao ; Debliquy, Marc ; et. al. Palladium nanoparticles deposition via precipitation: a new method to functionalize macroporous silicon. In: Science and Technology of Advanced Materials, Vol. 15, no.065002, p. 11 (12/11/2014)
Permanent URL http://hdl.handle.net/2078.1/152879