Fullerene-like WS2 nanoparticles and nanotubes by the vapor-phase synthesis of WCln and H2S

Inorganic fullerene-like (IF) nanoparticles and nanotubes of WS2 were synthesized by a gas phase reaction starting from WCln (n = 4, 5, 6) and H2S. The effect of the various metal chloride precursors on the formation of the products was investigated during the course of the study. Various parameters have been studied to understand the growth and formation of the IF-WS2 nanoparticles and nanotubes. The parameters that have been studied include flow rates of the various carrier gases, heating of the precursor metal chlorides and the temperature at which the reactions were carried out. The best set of conditions wherein maximum yields of the high quality pure-phase IF-WS2 nanoparticles and nanotubes are obtained have been identified. A detailed growth mechanism has been outlined to understand the course of formation of the various products of WS2.

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