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Issue 25, 2018
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Influence of graphene thickness and grain boundaries on MoS2 wrinkle nanostructures

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Abstract

Controlling wrinkle nanostructures of two-dimensional materials is critical for optimizing the material properties and device performance. In this study, we demonstrated the in situ synthesis of large-area MoS2 wrinkles on graphene by chemical-vapor-deposition-assisted sulfurization, and investigated the influence of graphene thickness and grain structures on the feature dimensions of MoS2 wrinkle nanostructures. The height, width, and overall surface roughness of the MoS2 wrinkles diminish as the number of graphene layers increases, which was further verified by determining the binding energy of graphene layers by density functional theory calculations. Furthermore, the feature dimensions of MoS2 wrinkle nanostructures were also influenced by graphene domain boundaries because of the difference in graphene nucleation density. This may be attributed to the influence of the mechanical properties of graphene substrates on the overall feature dimensions of MoS2 wrinkles, which are directly correlated with the interfacial adhesion energy. We believe that our findings may contribute toward the controllable synthesis of MoS2 wrinkle nanostructures and other two-dimensional materials used for high-performance devices.

Graphical abstract: Influence of graphene thickness and grain boundaries on MoS2 wrinkle nanostructures

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Publication details

The article was received on 18 Apr 2018, accepted on 30 May 2018 and first published on 31 May 2018


Article type: Paper
DOI: 10.1039/C8CP02460J
Citation: Phys. Chem. Chem. Phys., 2018,20, 17000-17008
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    Influence of graphene thickness and grain boundaries on MoS2 wrinkle nanostructures

    S. J. Kim, O. Kwon, D. W. Kim, J. Kim and H. Jung, Phys. Chem. Chem. Phys., 2018, 20, 17000
    DOI: 10.1039/C8CP02460J

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