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. 2019 Feb 7;9:1641. doi: 10.1038/s41598-018-37219-w

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) Image of 2D MoS₂ layers as-grown on SiO₂/Si and the corresponding cross-sectional HRTEM image. (b) Raman spectrum obtained from the 2D MoS₂ layers denoting their characteristic peaks. (c) Time-lapsed snapshot images to demonstrate the water-assisted spontaneous separation of 2D MoS₂ layers inside water. (d) Illustration of the water penetration process at the 2D MoS₂/SiO₂ interface along with the representative images of water contact angle measurements for 2D MoS₂ layers and SiO₂.