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Plasmon‐Resonance‐Based Generation of Cathodic Photocurrent at Electrodeposited Gold Nanoparticles Coated with TiO 2 Films
Author(s) -
Sakai Nobuyuki,
Fujiwara Yusuke,
Takahashi Yukina,
Tatsuma Tetsu
Publication year - 2009
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200800704
Subject(s) - photocurrent , surface plasmon resonance , indium tin oxide , materials science , nanoparticle , electrode , plasmon , photoelectrochemistry , colloidal gold , tin oxide , excited state , photochemistry , electron transfer , electrochemistry , oxide , optoelectronics , nanotechnology , thin film , chemistry , physics , nuclear physics , metallurgy
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.