Photoluminescence of MoS2 Prepared by Effective Grinding-Assisted Sonication Exfoliation

Exfoliation of bulk molybdenum disulfide (MoS2) using sonication in appropriate solvent is a promising route to large-scale preparation of few-layered or monolayered crystals. Grinding-assisted sonication exfoliation was used for preparing monolayered MoS2 nanosheets from natural mineral molybdenite...

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Bibliographic Details
Published in:Journal of nanomaterials 2014-01, Vol.2014 (2014), p.1-7
Main Authors: Zhang, Tong, Wang, Long-De, Lin, Meng-Na, Wu, Jing-Yuan
Format: Article
Language:English
Subjects:
Chemical vapor deposition
Dispersions
Education
Exfoliation
Laboratories
Methods
Molybdenum disulfide
Nanomaterials
Nanostructure
Optical properties
Photoluminescence
Quantum dots
Scanning electron microscopy
Solvents
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Summary:Exfoliation of bulk molybdenum disulfide (MoS2) using sonication in appropriate solvent is a promising route to large-scale preparation of few-layered or monolayered crystals. Grinding-assisted sonication exfoliation was used for preparing monolayered MoS2 nanosheets from natural mineral molybdenite. By controlling the sonication time, larger crystallites could be further exfoliated to smaller as well as thinner nanosheets without damaging their structures. The concentration of 1.6 mg mL−1 of final solution could be achieved. Several microscopic techniques like scanning electron microscopy, transmission electron microscopy, and atomic force microscopy were employed to evaluate the exfoliation results. Strong photoluminescence with the peak centered at 440 nm was also observed in the resulting dispersion which included several small lateral-sized (~3 nm) nanostructures.
ISSN:1687-4110
1687-4129
DOI:10.1155/2014/852735