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    Elastic properties of chemical-vapor-deposited monolayer MoS<inf>2</inf>, WS<inf>2</inf>, and their bilayer heterostructures

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    1407.2669v1.pdf
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    Genre
    Journal Article
    Date
    2014-09-10
    Author
    Liu, K
    Yan, Q
    Chen, M
    Fan, W
    Sun, Y
    Suh, J
    Fu, D
    Lee, S
    Zhou, J
    Tongay, S
    Ji, J
    Neaton, JB
    Wu, J
    Show allShow less
    Subject
    Molybdenum disulfide
    tungsten disulfide
    monolayer
    elastic modulus
    heterostructures
    Permanent link to this record
    http://hdl.handle.net/20.500.12613/5861
    
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    DOI
    10.1021/nl501793a
    Abstract
    © 2014 American Chemical Society. 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.
    Citation to related work
    American Chemical Society (ACS)
    Has part
    Nano Letters
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    ae974a485f413a2113503eed53cd6c53
    http://dx.doi.org/10.34944/dspace/5843
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