title: Reductive deposition of Rh nanostructures on n-type porous silicon: X-ray absorption and X-ray excited optical luminescence studies.
abstract: 22Porous silicon (PS) prepared from an n-type Si(100) wafer was utilized as a reducing agent and a nanosubstrate for the reduction of rhodium complex ions [RhCl6]3- from aqueous solution to metallic Rh nanostructures on the surface of the n-type PS. The morphology and the electronic properties of the PS layers as well as the rhodium nanostructures were studied by field emission scanning electron microscopy, X-ray absorption fine structures spectroscopy, and X-ray excited optical luminescence (XEOL). The average particle size of Rh nanostructures on PS was estimated to be approximately 7 nm by the X-ray diffraction pattern. The specificity ofXEOL allowed for the investigation of the effect of Rh nanostructures on the optical properties of PS.
authors.affiliation: Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada.
authors.forename: Pil-Sook G
authors.initials: PS
authors.lastname: Kim
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Tsun Kong
authors.initials: TK
authors.lastname: Sham