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RESEARCH PRODUCT

In Situ Heating TEM Study of Onion-like WS2 and MoS2 Nanostructures Obtained via MOCVD

Wolfgang TremelAswani YellaJulien PansiotHelen Annal ThereseNicole ZinkFlorian Banhart

subject

Materials scienceNanostructureAnnealing (metallurgy)General Chemical EngineeringNanoparticleNanotechnologyGeneral ChemistryChemical vapor depositionAmorphous solidlaw.inventionChemical engineeringTransmission electron microscopylawMaterials ChemistryMetalorganic vapour phase epitaxyCrystallization

description

We report on the in situ heating transmission electron microscopy (TEM) study of WS2 and MoS2 nanoparticles obtained from metal–organic chemical vapor deposition (MOCVD). The general behavior of MoS2 and WS2 is similar: Round, amorphous particles in the pristine sample transform to hollow, onion-like particles upon annealing. A second type of particle with straight layers exhibits only minor changes. A significant difference between both compounds could be demonstrated in their crystallization behavior. The results of the in situ heating experiments are compared to those obtained from an ex situ annealing process under Ar.

yearjournalcountryeditionlanguage
2007-12-11Chemistry of Materials
https://doi.org/10.1021/cm061867k