6533b871fe1ef96bd12d2342
RESEARCH PRODUCT
Diffusion-Driven Formation of MoS2 Nanotube Bundles Containing MoS2 Nanopods
Wolgang TremelAswani YellaFaegheh HoshyargarMartin Panthöfersubject
Surface diffusionNanotubeMaterials scienceFullereneAnnealing (metallurgy)General Chemical Engineeringchemistry.chemical_elementGeneral ChemistryChemical vapor depositionAmorphous solidChemical engineeringchemistryTransmission electron microscopyMolybdenumMaterials ChemistryOrganic chemistrydescription
MoS2 nanotube bundles, along with embedded nested fullerenes, were formed in a gas-phase reaction of molybdenum carbonyl and H2S gas with the assistance of I2. The amorphous Mo-S-I precursor particles obtained by quenching a modified metal organic chemical vapor deposition (MOCVD) reaction in a large temperature gradient were annealed at elevated temperature in an inert atmosphere. Under the influence of the iodine, the amorphous precursor formed a surface film with an enhanced mobility of the molybdenum and sulfur components. Point defects within the MoS2 layers, combined with the enhanced surface diffusion, lead to a scrolling of the inherently unstable MoS2 lamellae. The role of the reaction temperature on the final structure and morphology of the nanotubes, and also the annealing temperature, were studied by X-ray diffraction (XRD) and transmission electron microscopy (TEM). In order to determine the role of iodine as a chemical transport agent, the reaction was carried out in the absence of iodine an...
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2011-10-05 | Chemistry of Materials |