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

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

1
Hunan Key Laboratory of Super-Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha 410083, China
2
State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China
3
College of Physics and Microelectronics, Hunan University, Changsha 410082, China
4
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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Abstract

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
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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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