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Title: Toughening two dimensional materials through lattice disorder
Authors: Xie, Wenhui
Zhang, Xibei
Wei, Yujie
Gao, Huajian
Keywords: Engineering::Mechanical engineering
Issue Date: 2023
Source: Xie, W., Zhang, X., Wei, Y. & Gao, H. (2023). Toughening two dimensional materials through lattice disorder. Carbon, 213, 118268-.
Project: 002479-00001 
Journal: Carbon
Abstract: Carbon-based two-dimensional (2D) materials, with graphene being the most prominent example, are some of the strongest materials existing today due to their covalent bonding but at the same time also the most fragile, with fracture toughness close to that of an ideally brittle solid, due to their intrinsic lack of effective dissipation mechanisms. Here, by investigating fracture mechanisms in monolayer amorphous carbon (MAC), we reveal a novel strategy to toughen 2D materials through lattice disorder. It is shown that lattice disorder results in rippling which can alleviate stress concentration in the vicinity of crack-tips and render MAC flaw tolerant. Consequently, MAC outperforms graphene in resisting brittle fracture and endures larger strain to failure in the presence of a preexisting crack. Our work sheds light on the mechanisms of crack propagation in MAC and also suggests that it might be generally possible to design tough 2D materials through lattice disorder.
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2023.118268
Schools: School of Mechanical and Aerospace Engineering 
Organisations: Institute of High Performance Computing, A*STAR
Rights: © 2023 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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