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Title: Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO{sub 2}@TiO{sub 2} colloidal crystals

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.
Authors:
; ;  [1]
  1. Institute of Industrial Science, University of Tokyo, Meguro-ku, Tokyo 153-8505 (Japan)
Publication Date:
OSTI Identifier:
22499264
Resource Type:
Journal Article
Resource Relation:
Journal Name: APL Materials; Journal Volume: 3; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BINDING ENERGY; CRYSTALS; DEPOSITS; ELECTRODES; ELECTROLYTES; ELECTRONS; ETHANOL; EVAPORATION; GOLD; PARTICLES; PHOTOCURRENTS; SILICA; SILICON OXIDES; SPUTTERING; TITANIUM OXIDES