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Open AccessArticle

Synthesis of Large-Scale Single-Crystalline Monolayer WS2 Using a Semi-Sealed Method

1
Institute of electronic information and engineering, Hebei University of Technology, Tianjin 300401, China
2
China Electronics Technology Group Corp 46th Research Institute, Tianjin 300220, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2018, 8(2), 100; https://doi.org/10.3390/nano8020100
Received: 17 December 2017 / Revised: 28 January 2018 / Accepted: 8 February 2018 / Published: 11 February 2018
(This article belongs to the Special Issue Experimental Nanosciences, Computational Chemistry, and Data Analysis)
As a two-dimensional semiconductor, WS2 has attracted great attention due to its rich physical properties and potential applications. However, it is still difficult to synthesize monolayer single-crystalline WS2 at larger scale. Here, we report the growth of large-scale triangular single-crystalline WS2 with a semi-sealed installation by chemical vapor deposition (CVD). Through this method, triangular single-crystalline WS2 with an average length of more than 300 µm was obtained. The largest one was about 405 μm in length. WS2 triangles with different sizes and thicknesses were analyzed by optical microscope and atomic force microscope (AFM). Their optical properties were evaluated by Raman and photoluminescence (PL) spectra. This report paves the way to fabricating large-scale single-crystalline monolayer WS2, which is useful for the growth of high-quality WS2 and its potential applications in the future. View Full-Text
Keywords: semi-sealed; CVD; WS2; Raman; AFM semi-sealed; CVD; WS2; Raman; AFM
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Lan, F.; Yang, R.; Xu, Y.; Qian, S.; Zhang, S.; Cheng, H.; Zhang, Y. Synthesis of Large-Scale Single-Crystalline Monolayer WS2 Using a Semi-Sealed Method. Nanomaterials 2018, 8, 100.

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