Decoration of WS2 Nanotubes and Fullerene-Like MoS2 with Gold Nanoparticles

A new technique of gold nanoparticle (AuNP) growth on the sidewalls of WS2 inorganic nanotubes (INT-WS2) and the surface of MoS2 fullerene-like nanoparticles (IF-MoS2) is developed to produce metal–semiconductor nanocomposites. The coverage density and mean size of the nanoparticles are dependent on...

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Bibliographic Details
Published in:Journal of physical chemistry. C 2014-01, Vol.118 (4), p.2161-2169
Main Authors: Polyakov, Alexander Yu, Yadgarov, Lena, Popovitz-Biro, Ronit, Lebedev, Vasily A, Pinkas, Iddo, Rosentsveig, Rita, Feldman, Yishay, Goldt, Anastasia E, Goodilin, Eugene A, Tenne, Reshef
Format: Article
Language:English
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Summary:A new technique of gold nanoparticle (AuNP) growth on the sidewalls of WS2 inorganic nanotubes (INT-WS2) and the surface of MoS2 fullerene-like nanoparticles (IF-MoS2) is developed to produce metal–semiconductor nanocomposites. The coverage density and mean size of the nanoparticles are dependent on the HAuCl4/MS2 (M = W, Mo) molar ratio. AuNPs formation mechanism seems to involve spatially divided reactions of AuCl4 – reduction and WS2/MoS2 oxidation taking place on the surface defects of the disulfide nanostructures rather than directly at the AuNP-INT/IF interface. A strong epitaxial matching between the lattices of the gold nanoparticles and the INT-WS2 or IF-MoS2 seems to suppress plasmon resonance in the nanocomposites with small (
ISSN:1932-7447
1932-7455
DOI:10.1021/jp407388h