Plasmon-resonance-based generation of cathodic photocurrent at electrodeposited gold nanoparticles coated with TiO2 films

Nobuyuki Sakai; Yusuke Fujiwara; Yukina Takahashi; Tetsu Tatsuma

doi:10.1002/cphc.200800704

Plasmon-resonance-based generation of cathodic photocurrent at electrodeposited gold nanoparticles coated with TiO2 films

Chemphyschem. 2009 Mar 23;10(5):766-9. doi: 10.1002/cphc.200800704.

Authors

Nobuyuki Sakai¹, Yusuke Fujiwara, Yukina Takahashi, Tetsu Tatsuma

Affiliation

¹ Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505 (Japan), Fax: (+81) 3-5452-6338.

PMID: 19222041
DOI: 10.1002/cphc.200800704

Abstract

Reversed photoresponse: Indium tin oxide (ITO)/Au nanoparticle (NP)/TiO(2) electrodes (see picture) exhibit cathodic photocurrents and positive photopotentials under visible light, whereas ITO/TiO(2)/Au NP electrodes show an inverted response. This behavior indicates that electron transfer occurs from the plasmon-excited Au NPs to the TiO(2) film. An enhanced O(2) photoreduction activity is found for ITO/Au NP/TiO(2)/Pt electrodes.