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Plasmon‐Resonance‐Based Generation of Cathodic Photocurrent at Electrodeposited Gold Nanoparticles Coated with TiO2 Films |
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| Authors: | Nobuyuki Sakai Dr Yusuke Fujiwara Yukina Takahashi Dr Tetsu Tatsuma Prof |
| Institution: | 1. Institute of Industrial Science, The University of Tokyo, 4‐6‐1 Komaba, Meguro‐ku, Tokyo 153‐8505 (Japan), Fax: (+81)?3‐5452‐6338;2. PRESTO, Japan Science and Technology Agency (JST), 4‐1‐8 Honcho, Kawaguchi, Saitama 332‐0012 (Japan) |
| Abstract: | Reversed photoresponse: Indium tin oxide (ITO)/Au nanoparticle (NP)/TiO2 electrodes (see picture) exhibit cathodic photocurrents and positive photopotentials under visible light, whereas ITO/TiO2/Au NP electrodes show an inverted response. This behavior indicates that electron transfer occurs from the plasmon‐excited Au NPs to the TiO2 film. An enhanced O2 photoreduction activity is found for ITO/Au NP/TiO2/Pt electrodes.  |
| Keywords: | electrochemistry gold nanoparticles photovoltaic cells surface plasmon resonance |