Fracture‐induced nanoscrolls from CVD‐grown monolayer molybdenum disulfide |
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| Authors: | Song Hao Bingchu Yang Yongli Gao |
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| Institution: | 1. Institute of Super Microstructure and Ultrafast Process in Advanced Materials, College of Physics and Electronics, Central South University, Changsha, P.R. China;2. Hunan Key Laboratory for Super‐microstructure and Ultrafast Process, Central South University, Changsha, P.R. China;3. Department of Physics and Astronomy, University of Rochester, Rochester, USA |
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| Abstract: | We report a simple and effective way of fabricating molybdenum disulfide (MoS2) nanoscrolls by self‐rolling up fractured monolayer CVD‐grown MoS2 microflakes. Morphological results reveal that MoS2 nanoscrolls are formed only at newly formed edges, owing to an orientation‐specific fracture behavior. Using Raman spectroscopy, we show that the E12g Raman peak (A1g peak) for MoS2 nanoscrolls significantly red‐shifts (blue‐shifts), indicating structural change. The proposed mechanism is that the newly formed edges induced by fracture behavior self‐roll up to nanoscrolls to minimize the surface free energy, meanwhile, the serious lattice contradiction of upper sulfur plane controls the rolling directions. (© 2016 WILEY‐VCH Verlag GmbH &Co. KGaA, Weinheim) |
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| Keywords: | self‐rolling thermal strain Raman spectroscopy two‐dimensional materials MoS2 |
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