Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO{sub 2}@TiO{sub 2} colloidal crystals
- Institute of Industrial Science, University of Tokyo, Meguro-ku, Tokyo 153-8505 (Japan)
Photoelectrodes based on plasmonic Au semishell (or halfshell) arrays are developed. A colloidal crystal consisting of SiO{sub 2}@TiO{sub 2} core-shell particles is prepared on a TiO{sub 2}-coated transparent electrode. A Au semishell (or halfshell) array is deposited by sputtering or evaporation on the colloidal crystal. An electrode with the semishell (or halfshell) array exhibits negative photopotential shifts and anodic photocurrents under visible light at 500-800 nm wavelengths in an aqueous electrolyte containing an electron donor. In particular, hydroquinone and ethanol are good electron donors. The photocurrents can be explained in terms of plasmon-induced charge separation at the Au-TiO{sub 2} interface.
- OSTI ID:
- 22499264
- Journal Information:
- APL Materials, Journal Name: APL Materials Journal Issue: 10 Vol. 3; ISSN AMPADS; ISSN 2166-532X
- Country of Publication:
- United States
- Language:
- English
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