Structure analysis on the nanoscale : closed WS2 nanoboxes through a cascade of topo- and epitactic processes
Hoshyargar, Faegheh, Mugnaioli, Enrico, Branscheid, Robert, Kolb, Ute, Panthofer, Martin, & Tremel, Wolfgang (2014) Structure analysis on the nanoscale : closed WS2 nanoboxes through a cascade of topo- and epitactic processes. CrystEngComm, 16(23), pp. 5087-5092.
Closed WS2 nanoboxes were formed by topotactic sulfidization of a WO3/WO3 center dot 1/3H(2)O intergrowth precursor. Automated diffraction tomography was used to elucidate the growth mechanism of these unconventional hollow structures. By partial conversion and structural analysis of the products, each of them representing a snapshot of the reaction at a given point in time, the overall reaction can be broken down into a cascade of individual steps and each of them identified with a basic mechanism. During the initial step of sulfidization WO3 center dot 1/3H(2)O transforms into hexagonal WO3 whose surface allows for the epitaxial induction of WS2. The initially formed platelets of WS2 exhibit a preferred orientation with respect to the nanorod surface. In the final step individual layers of WS2 coalesce to form closed shells. In essence, a cascade of several topotactic reactions leads to epitactic induction and formation of closed rectangular hollow boxes made up from hexagonal layers.
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|Item Type:||Journal Article|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2014 The Royal Society of Chemistry|
|Deposited On:||11 Dec 2014 23:15|
|Last Modified:||14 Dec 2014 21:11|
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