title: Synthesis of silica-gold nanocomposites and their porous nanoparticles by an in-situ approach.
abstract: We demonstrate the one-step synthesis of a silica-gold nanocomposite by simultaneous hydrolysis and reduction of gold chloride. The aminophenyl group was used as a reducing agent, and the trimethoxy silane group acts a precursor for the formation of silica. The porous gold nanoparticles were formed by etching out the silica-gold nanocomposite by hydrofluoric acid. The electron diffraction of porous gold nanoparticles showed that the particle are polycrystalline with FCC structure. The silica-gold nanocomposite exhibited nonlinear current-voltage behavior, and the porous gold nanoparticles displayed linear current-voltage behavior.
authors.affiliation: Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.
authors.forename: Ashavani
authors.initials: A
authors.lastname: Kumar
authors.forename: Victor L
authors.initials: VL
authors.lastname: Pushparaj
authors.forename: Saravanababu
authors.initials: S
authors.lastname: Murugesan
authors.forename: Gunaranjan
authors.initials: G
authors.lastname: Viswanathan
authors.forename: Rohit
authors.initials: R
authors.lastname: Nalamasu
authors.forename: Robert J
authors.initials: RJ
authors.lastname: Linhardt
authors.forename: Omkaram
authors.initials: O
authors.lastname: Nalamasu
authors.forename: Pulickel M
authors.initials: PM
authors.lastname: Ajayan
mesh_terms: D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D046529:Microscopy, Electron, Transmission; D053761:Nanocomposites / Q000737:chemistry* / Q000648:ultrastructure*; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013053:Spectrophotometry
chemical_list: D006046:Gold; D012822:Silicon Dioxide