Journal
NANOTECHNOLOGY
Volume 29, Issue 8, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6528/aaa381
Keywords
graphene-like WS2; mechanochemical solventless nanostructuration; structural and spectral characterization
Funding
- Targeted Research & Development Initiatives of the Science and Technology Center in Ukraine
- National Academy of Sciences of Ukraine
- Targeted Comprehensive Fundamental Research Program of the National Academy of Sciences of Ukraine
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The possibility of the efficient preparation of graphene-like 1H-WS2 by the primary solventless nanostructuration of bulk 2H-WS2 by means of its mechanochemical treatment in the presence of a chemically inert agent (NaCl) and the subsequent liquid exfoliation of the nanostructured 2H-WS2 in an organic solvent is shown for the first time. The shear stresses generated during the grinding of the WS2/NaCl mixture caused the formation of WS2 particles with a reduced number of layers, while the stresses normal to their surface led to their cracking and a significant reduction in lateral size. The graphene-like morphology of the 1H-WS2 nanoparticles in the prepared dispersions is confirmed by atomic force microscopy and Raman spectroscopy. The semiconducting character of 1H-WS2 is supported by electron absorption and x-ray photoelectron spectroscopy data.
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