Nucleation mechanism and morphology evolution of MoS2 flakes grown by chemical vapor deposition Project supported by the National Natural Science Foundation of China for Youths (Grant No. 61504036), the Natural Science Foundation of Hebei Province for Youths, China (Grant No. A2016201087), the Doctoral Fund of the Ministry of Education of China (Grant No. 20131301120003), and the Science and Technology Project of Hebei Province, China (Grant No. 13214315). |
(color online) (a) Raman spectra of different regions marked as 1–5 in the inset, the inset shows SEM images of the small triangle, the similar hexagon, the edge of truncated triangle, the center of truncated triangle and the outside of the triangle marked as 1–5 correspondingly, (b) Raman mapping of the magnitude of the frequency difference between A1g and |
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