Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO2@TiO2 colloidal crystals | Zendy

Ling Wu | Zendy; Hiroyasu Nishi | Zendy; Tetsu Tatsuma | Zendy

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Plasmon-induced charge separation at two-dimensional gold semishell arrays on SiO2@TiO2 colloidal crystals

Author(s) -

Ling Wu,

Hiroyasu Nishi,

Tetsu Tatsuma

Publication year - 2015

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4922935

Subject(s) - materials science , plasmon , colloidal crystal , crystal (programming language) , electrode , surface plasmon , evaporation , colloid , electrolyte , optoelectronics , surface plasmon resonance , photocurrent , photoelectrochemistry , nanotechnology , nanoparticle , electrochemistry , chemical engineering , chemistry , physics , computer science , engineering , thermodynamics , programming language

Photoelectrodes based on plasmonic Au semishell (or halfshell) arrays are developed. A colloidal crystal consisting of SiO2@TiO2 core-shell particles is prepared on a TiO2-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-TiO2 interface

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