Structural characterization and photocurrent properties of cis-di(thiocyanato)-bis(4,4′-dicarboxy-2,2′-bipyridine) ruthenium(II) monolayers on the gold surfaces

Nao Terasaki, Satoshi Nitahara, Tsuyoshi Akiyama, Sunao Yamada

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12 Citations (Scopus)

Abstract

A self-assembled monolayer of cis-di(thiocyanato)-bis(4,4′-dicarboxy- 2,2′-bipyridine) ruthenium(II) (denoted as N3) was prepared on a gold electrode. Immobilization of N3 on the gold electrode through Au (electrode)-S (NCS ligands in N3) bonding was confirmed from electrochemical and X-ray photoelectron spectroscopy (XPS) measurements. In an acetonitrile solution containing methylviologen (MV) and oxygen as electron acceptors, the cathodic photocurrent, based on the photoexcitation of N3, was clearly observed, and the incident photon-to-current conversion efficiency (IPCE) was estimated to be ∼0.1% at 520 nm. Photocurrent responses were compared between the nanostructured gold electrode prepared from gold nanoparticles and the planar electrode; the former gave larger photocurrents than the latter, especially in the longer wavelength region around the localized surface plasmon bands of gold nanoparticles.

Original languageEnglish
Pages (from-to)2795-2798
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume44
Issue number4 B
DOIs
Publication statusPublished - Apr 1 2005

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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