Abstract
Large-scale hexagonal SnS2 flakes with high quality and tunable structures have been fabricated by an improved chemical vapor deposition method. The flakes follow a spiral growth mechanism and exhibit a two-dimensional structure with a large width-to-height ratio. Raman oscillation induced by laser interference has been observed on the flakes with a pyramid-shaped top. Based on the analysis on oscillatory period and height profile, the index of refraction for the grown SnS2 can be determined. SnS2 flakes with optimized structures have been further designed and prepared successfully, on which enhanced Raman emission can be obtained across the whole flake.
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