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

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• 作者：Alexander Yu. Polyakov ; Lena Yadgarov ; Ronit Popovitz-Biro ; Vasily A. Lebedev ; Iddo Pinkas ; Rita Rosentsveig ; Yishay Feldman ; Anastasia E. Goldt ; Eugene A. Goodilin ; Reshef Tenne
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：January 30, 2014
• 年：2014
• 卷：118
• 期：4
• 页码：2161-2169
• 全文大小：533K
• ISSN：1932-7455

文摘

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鈥搒emiconductor 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^{鈥?/sup> 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 (<10 nm mean size) AuNPs.}