Decoration of ws2 nanotubes and fullerene-like mos2 with gold nanoparticles

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

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

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 WS 2/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.

Original languageEnglish
Pages (from-to)2161-2169
Number of pages9
JournalJournal of Physical Chemistry C
Volume118
Issue number4
DOIs
Publication statusPublished - 30 Jan 2014
Externally publishedYes

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