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Title: Coating two-dimensional MoS2 with polymer creates a corrosive non-uniform interface
Authors: Thi, QH
Kim, H
Zhao, J 
Ly, TH
Issue Date: 2018
Publisher: Nature Publishing Group
Source: npj 2D materials and applications, 19 Oct. 2018, v. 2, 34, p. 1-7 How to cite?
Journal: npj 2D materials and applications 
Abstract: Two-dimensional (2D) materials and soft materials are both susceptible to mechanical instabilities, such as buckling, wrinkling, folding and creasing, especially when located on surfaces. Here, we report that weak van der Waals interactions cause the interface between 2D molybdenum disulphide (MoS2) and a soft poly(methyl methacrylate) coating to demonstrate mechanical instability and delamination. The resulting non-uniform and buckled interface greatly hampers the ability of the coating to protect the MoS2 substrate. Also, the corrosion rate of 2D MoS2 and quench rate of intrinsic luminescence in 2D MoS2 were significantly accelerated by the soft coating. Owing to the formation of corrosive cavities at the interface, the geometry and size of the flakes became the dominating factor, and a critical size of 2D flakes for such interfacial instability was determined based on elasticity theory. Such hazardous corrosion in a 2D material caused by a soft coating raises concern for their use in electronic packaging, and for the processing of van der Waals-layered materials for future applications.
EISSN: 2397-7132
DOI: 10.1038/s41699-018-0079-x
Rights: 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
© The Author(s) 2018
The following publication Thi, Q. H., Kim, H., Zhao, J., & Ly, T. H. (2018). Coating two-dimensional MoS 2 with polymer creates a corrosive non-uniform interface. NPJ 2D Materials and Applications, 2(1), 34, 1-7 is available at
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