Article pubs.acs.org/JPCC
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,*,† and Reshef Tenne‡ †
Department of Materials Science, Lomonosov Moscow State University, GSP-1, 1-73 Leninskiye Gory, Laboratory Building B, Moscow, Russia 119991 ‡ Department of Materials and Interfaces and §Department of Chemical Research Support, Faculty of Chemistry, Weizmann Institute of Science, Rehovot, Israel 76100 S Supporting Information *
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 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 (
