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Issue 3, 2019
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Nanoscale fracture of defective popgraphene monolayers

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A new carbon allotrope, namely popgraphene, has been recently demonstrated to possess high potentials for nanodevice applications. Herein, the fracture of defective popgraphene was studied using molecular dynamics simulations and continuum modeling. Three scenarios of defects were considered, including an individual point defect, distributed point defects, and nanocracks. It was found that the fracture stress of popgraphene with an individual point defect was governed by both the geometry of the defect and the critical bond where fracture initiates. Moreover, the fracture stress of popgraphene with distributed point defects was discovered to be inversely proportional to the defect density, showing a nice linear trend. Furthermore, for popgraphene with a nanocrack, it failed in a brittle fashion and exhibited a negligible lattice trapping effect. The Griffith criterion was subsequently employed with the consideration of crack deflection to accurately predict the dependence of fracture stress on crack size. The present study lays a mechanistic foundation for nanoscale applications of popgraphene and offers a better understanding of the roles of defects in fracture of low-dimensional materials.

Graphical abstract: Nanoscale fracture of defective popgraphene monolayers

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The article was received on 22 Oct 2018, accepted on 06 Dec 2018 and first published on 07 Dec 2018

Article type: Paper
DOI: 10.1039/C8CP06577B
Phys. Chem. Chem. Phys., 2019,21, 1242-1253

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    Nanoscale fracture of defective popgraphene monolayers

    F. Meng, M. Ni, F. Chen, J. Song and D. Wei, Phys. Chem. Chem. Phys., 2019, 21, 1242
    DOI: 10.1039/C8CP06577B

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