Metal-Semiconductor Heteronanocrystals with Desired Configurations for Plasmonic Photocatalysis

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Precise control over the topology of plasmonic metal-semiconductor heteronanostructures is essential for fully harnessing their plasmonic function and hence for designing innovative solar energy conversion platforms. Here, we present a rational synthesis strategy for the realization of plasmonic metal semiconductor heteronanocrystals with intended configurations through the site-selective overgrowth of semiconductor Cu2O on desired sites of anisotropic Au nanocrystals. Both the exploitation of structural characteristics of Au nanocrystals and the selective stabilization of their surfaces are keys to the construction of heteronanocrystals with a specific configuration. Our approach can provide an opportunity to precisely explore the link between the solar energy conversion efficiency and the structure of heteronanocrystals as well as to obtain important insights into the underpinning mechanism. Heteronanocrystals produced by Cu2O overgrowth preferentially on the multiple high-curvature sites of Au nano crystals exhibited prominent photocatalytic hydrogen production activity due to efficient charge separation by strong plasmon excitation at the Au-Cu2O interface and subsequent sustainable hot electron transfer from Au to Cu2O.
Publisher
AMER CHEMICAL SOC
Issue Date
2016-12
Language
English
Article Type
Article
Keywords

ENHANCED RAMAN-SCATTERING; HIGH-INDEX FACETS; VISIBLE-LIGHT; HYBRID NANOSTRUCTURES; HYDROGEN GENERATION; GOLD NANORODS; NANOCRYSTALS; WATER; NANOPARTICLES; GROWTH

Citation

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.138, no.48, pp.15766 - 15773

ISSN
0002-7863
DOI
10.1021/jacs.6b10288
URI
http://hdl.handle.net/10203/216133
Appears in Collection
CH-Journal Papers(저널논문)
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