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Crystals 2016, 6(11), 151; doi:10.3390/cryst6110151

E’’ Raman Mode in Thermal Strain-Fractured CVD-MoS2

Hunan Key Laboratory of Super-Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
College of Physics and Microelectronics, Hunan University, Changsha 410082, China
Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627, USA
Author to whom correspondence should be addressed.
Academic Editor: Helmut Cölfen
Received: 10 October 2016 / Revised: 11 November 2016 / Accepted: 14 November 2016 / Published: 18 November 2016
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Molybdenum disulfide (MoS2) has recently attracted considerable interests due to its unique properties and potential applications. Chemical vapor deposition (CVD) method is used widely to grow large-area and high-quality MoS2 single crystals. Here, we report our investigation on thermal strain-fractured (SF) single crystalline MoS2, oxidation-fractured MoS2, and normal MoS2 by atomic force microscopy (AFM), Raman and photoluminescence (PL) measurements. Several new Raman modes are observed for SF-MoS2. The band gap of SF-MoS2 is enlarged by 150 meV and the PL intensity is reduced substantially. These results imply that a structural transformation occurs in SF-MoS2. Our findings here are useful for the design of MoS2-based nanocatalysts with relative high catalytic activity. View Full-Text
Keywords: thermal strain-fractured MoS2; defect; Raman spectrum; photoluminescence spectrum; structural transformation thermal strain-fractured MoS2; defect; Raman spectrum; photoluminescence spectrum; structural transformation

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wu, D.; Huang, H.; Zhu, X.; He, Y.; Xie, Q.; Chen, X.; Zheng, X.; Duan, H.; Gao, Y. E’’ Raman Mode in Thermal Strain-Fractured CVD-MoS2. Crystals 2016, 6, 151.

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