Hybrid chalcogenide nanoparticles : 2D-WS2 nanocrystals inside nested WS2 fullerenes

Hoshyargar, Faegheh, Corrales, Tomas P., Branscheid, Robert, Kolb, Ute, Kappl, Michael, Panthofer, Martin, & Tremel, Wolfgang (2013) Hybrid chalcogenide nanoparticles : 2D-WS2 nanocrystals inside nested WS2 fullerenes. Dalton Transactions, 42(40), pp. 14568-14575.

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Abstract

The MOCVD assisted formation of nested WS2 inorganic fullerenes (IF-WS2) was performed by enhancing surface diffusion with iodine, and fullerene growth was monitored by taking TEM snapshots of intermediate products. The internal structure of the core-shell nanoparticles was studied using scanning electron microscopy (SEM) after cross-cutting with a focused ion beam (FIB). Lamellar reaction intermediates were found occluded in the fullerene particles. In contrast to carbon fullerenes, layered metal chalcogenides prefer the formation of planar, plate-like structures where the dangling bonds at the edges are stabilized by excess S atoms. The effects of the reaction and annealing temperatures on the composition and morphology of the final product were investigated, and the strength of the WS2 shell was measured by intermittent contact-mode AFM. The encapsulated lamellar structures inside the hollow spheres may lead to enhanced tribological activities.

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ID Code: 79410
Item Type: Journal Article
Refereed: Yes
DOI: 10.1039/C3DT51537K
ISSN: 1477-9226
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2013 The Royal Society of Chemistry
Deposited On: 11 Dec 2014 23:43
Last Modified: 17 Dec 2014 04:28

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