Elastic properties of chemical-vapor-deposited monolayer MoS2, WS2, and their bilayer heterostructures.

By Kai Liu, Q. Yan, Michelle E. Chen, W. Fan, Yinghui Sun, Joonki Suh, D. Fu, Sangwook Lee, Jian Zhou, S. Tongay and 3 more. Nano letters (Print), 2014

618 citations recorded by the source corpus.

Elastic properties of materials are an important factor in their integration in applications. Chemical vapor deposited (CVD) monolayer semiconductors are proposed as key components in industrial-scale flexible devices and building blocks of two-dimensional (2D) van der Waals heterostructures. However, their mechanical and elastic properties have not been fully characterized. Here we report high 2D elastic moduli of CVD monolayer MoS2 and WS2 (∼170 N/m), which is very close to the value of exfoliated MoS2 monolayers and almost half the value of the strongest material, graphene. The 2D moduli of their bilayer heterostructures are lower than the sum of 2D modulus of each layer but comparable to the corresponding bilayer homostructure, implying similar interactions between the hetero monolayers as between homo monolayers. These results not only provide deep insight into understanding interlayer interactions in 2D van der Waals structures but also potentially allow engineering of their elastic properties as desired.

Subfields: Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/4a47351cc1830ad12e49a012a743c4deb64f73a8

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In Materials Chemistry

Citations in the corpus

Graphene versus MoS2: A short review (2014, methodology): “performed similar nanoindentation experiments on chemical-vapor-deposited SLMoS2, obtaining an effective Young’s modulus of about 170 N·m−1 [64].”
Production and processing of graphene and related materials (2020, neutral): “136 V.2 Growth on insulators ....................................................................................... 166 V.3 Brief comparison of all methods based on CVD and MBE techniques .................. 178 VI. GRAPHENE TRANSFER, PLACEMENT AND DECOUPLING FROM SUBSTRATE ...........”
Tailoring the mechanical properties of 2D materials and heterostructures (2018, methodology): “Similar results have been obtained for monolayer MoS2 and WS2 synthesized by CVD [49].”