Facile fabrication of photoelectrochemical assemblies consisting of gold nanoparticles and a tris(2,2′-bipyridine)ruthenium(II)-viologen linked thiol

Yutaka Kuwahara, Tsuyoshi Akiyama, Sunao Yamada

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Facile fabrication of a modified electrode with gold nanoparticles and a tris(2,2′-bipyridine)ruthenium(II)-viologen linked thiol (RuVS) is described. First, the gold nanoparticles (14 ± 1 nm) were precipitated onto the gold electrode in an aqueous solution. Then, this electrode was immersed into a acetonitrile solution containing RuVS, to immobilize it via Au-S bonding. Scanning electron micrographs show agglomeration and island formation of the gold particles on the electrode and 1-3 μm thickness of the deposition. In cyclic voltammetry, a redox couple due to one-electron reduction of the viologen moiety was clearly observed and its intensity increased with increasing the extent of deposition. The anodic photocurrent from the modified electrode ascribed to ruthenium-complex-sensitized redox cycles was clearly observed and was more than 15-fold larger as compared with that of the flat electrode (without gold particles).

Original languageEnglish
Pages (from-to)5714-5716
Number of pages3
JournalLangmuir
Volume17
Issue number19
DOIs
Publication statusPublished - Sep 18 2001

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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