Effects of capping layers on the photoelectrochemical property of silver nanoparticle-modified indium-tin-oxide electrode

Ken Ichi Matsuoka, Hironobu Tahara, Tsuyoshi Akiyama, Sunao Yamada

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Photoelectrochemical properties of indium-tin-oxide (ITO) substrate modified with silver nanoparticles (AgNPs) and effects of surface capping layer of AgNP were investigated in the water/acetonitrile (H2O/MeCN) electrolyte solutions with the presence of oxygen as an electron acceptor. The modified ITO substrate showed photocurrent response mainly driven by the photoinduced electron transfer from ITO substrate to AgNPs. In addition, its photoelectrochemical property significantly depended on the solvent composition of electrolyte solution which was in correlation with surface status of AgNPs. Combination of photoelectrochemical measurements and spectroscopic analysis suggested that presence of considerable amount of MeCN in the electrolyte solution triggered partial displacement of capping citrate ions to activate photocurrent generation.

Original languageEnglish
Pages (from-to)239-243
Number of pages5
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume221
Issue number2-3
DOIs
Publication statusPublished - Jun 25 2011

All Science Journal Classification (ASJC) codes

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

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