skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Abstract

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
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 10; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 2166-532X
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

Citation Formats

Wu, Ling, Nishi, Hiroyasu, and Tatsuma, Tetsu, E-mail: tatsuma@iis.u-tokyo.ac.jp. Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO{sub 2}@TiO{sub 2} colloidal crystals. United States: N. p., 2015. Web. doi:10.1063/1.4922935.
Wu, Ling, Nishi, Hiroyasu, & Tatsuma, Tetsu, E-mail: tatsuma@iis.u-tokyo.ac.jp. Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO{sub 2}@TiO{sub 2} colloidal crystals. United States. doi:10.1063/1.4922935.
Wu, Ling, Nishi, Hiroyasu, and Tatsuma, Tetsu, E-mail: tatsuma@iis.u-tokyo.ac.jp. Thu . "Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO{sub 2}@TiO{sub 2} colloidal crystals". United States. doi:10.1063/1.4922935.
@article{osti_22499264,
title = {Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO{sub 2}@TiO{sub 2} colloidal crystals},
author = {Wu, Ling and Nishi, Hiroyasu and Tatsuma, Tetsu, E-mail: tatsuma@iis.u-tokyo.ac.jp},
abstractNote = {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.},
doi = {10.1063/1.4922935},
journal = {APL Materials},
issn = {2166-532X},
number = 10,
volume = 3,
place = {United States},
year = {2015},
month = {10}
}