title: Green synthesis and electrophoretic deposition of Ag nanoparticles on SiO₂/Si(100).
abstract: Plasmonic substrates were prepared by electrophoretic deposition of Ag nanoparticles on SiO2/Si(100). The Ag nanoparticles were obtained using [Ag(NH3)2](+) as the Ag precursor and d-glucose as the reducing agent. Under optimized conditions, this simple and green synthesis method furnished a suspension of Ag nanoparticles with a narrow dimensional dispersion (centered around 27 nm) and a negative z-potential, suitable for electrophoretic deposition. Samples were chemically, optically and morphologically characterized by photoemission and UV-vis spectroscopy and electron microscopy, and tested as substrates for surface enhanced Raman spectroscopy. Despite being a very simple procedure, good enhancement factors were measured thanks to the formation of hot spots, formed by sandwiching the analyte (benzenethiol) between sequentially deposited Ag nanoparticles.
authors.affiliation: Department of Chemical Sciences and INSTM Research Unit, University of Padova, Via Marzolo, 1, I-35131 Padova, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Giallongo
authors.forename: G A
authors.initials: GA
authors.lastname: Rizzi
authors.forename: V
authors.initials: V
authors.lastname: Weber
authors.forename: G
authors.initials: G
authors.lastname: Ennas
authors.forename: R
authors.initials: R
authors.lastname: Signorini
authors.forename: G
authors.initials: G
authors.lastname: Granozzi
mesh_terms: D004586:Electrophoresis / Q000379:methods*; D055772:Green Chemistry Technology / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D056951:Photoelectron Spectroscopy; D012825:Silicon / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013535:Suspensions
chemical_list: D013535:Suspensions; D012834:Silver; D012822:Silicon Dioxide; D012825:Silicon