title: Silver nanoparticles deposited on porous silicon as a surface-enhanced Raman scattering (SERS) active substrate.
abstract: Silver nanoparticles were deposited spontaneously from their aqueous solution on a porous silicon (PS) layer. The PS acts both as a reducing agent and as the substrate on which the nanoparticles nucleate. At higher silver ion concentrations, layers of nanoparticle aggregates were  formed on the PS surface. The morphology of the metallic layers and their SERS activity were influenced by the concentrations of the silver ion solutions used for deposition. Raman measurements of rhodamine 6G (R6G) and crystal violet (CV) adsorbed on these surfaces showed remarkable enhancement  of up to about 10 orders of magnitude.
authors.affiliation: Department of Chemistry, Ben-Gurion University, Be'er-Sheva 84105, Israel.
authors.forename: Leila
authors.initials: L
authors.lastname: Zeiri
authors.forename: Katya
authors.initials: K
authors.lastname: Rechav
authors.forename: Ze'ev
authors.initials: Z
authors.lastname: Porat
authors.forename: Yehuda
authors.initials: Y
authors.lastname: Zeiri
mesh_terms: D055664:Electrochemical Techniques; D005840:Gentian Violet / Q000032:analysis; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D016062:Porosity; D019163:Reducing Agents / Q000737:chemistry*; D012235:Rhodamines / Q000032:analysis; D012680:Sensitivity and Specificity; D012825:Silicon / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*; D013499:Surface Properties
chemical_list: D019163:Reducing Agents; D012235:Rhodamines; C026188:rhodamine 6G; D012834:Silver; D005840:Gentian Violet; D012825:Silicon