title: Photodeposition of Ag or Pt onto TiO2 nanoparticles decorated on step edges of HOPG.
abstract: Ordered linear arrays of titanium dioxide nanoparticles were fabricated on highly oriented pyrolytic graphite utilizing a step edge decoration method. Ag- or Pt-based nanoparticles were then photodeposited onto the titanium dioxide nanoparticles (∼18 nm) to simultaneously verify photocatalytic activity and to demonstrate a viable route to load the titanium dioxide nanoparticles with metals. Scanning electron microscopy and atomic force microscopy determined the morphology, size, and distribution of the particles. X-ray photoelectron spectroscopy confirmed the identity of the titanium dioxide nanoparticles, and transmission electron microscopy showed that some of the particles were rutile single crystals. Energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy determined the chemical composition of the metal-based nanoparticles selectively loaded on the linear arrays of titanium dioxide nanoparticles.
authors.affiliation: Department of Chemistry, Center for Solar Energy, University of California Irvine, 334B Rowland Hall, Mail Code 2025, Irvine, California 92697, USA.
authors.forename: James
authors.initials: J
authors.lastname: Taing
authors.forename: Ming H
authors.initials: MH
authors.lastname: Cheng
authors.forename: John C
authors.initials: JC
authors.lastname: Hemminger