Graphene heals thy cracks

被引：14

作者：

Debroy, Sanghamitra ^{[1
]}

Miriyala, V. Pavan Kumar ^{[1
]}

Sekhar, K. Vijaya ^{[2
]}

Acharyya, Swati Ghosh ^{[2
]}

Acharyya, Amit ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Elect Engn, Hyderabad, Andhra Pradesh, India

[2] Univ Hyderabad, Sch Engn Sci & Technol, Hyderabad 500134, Andhra Pradesh, India

来源：

COMPUTATIONAL MATERIALS SCIENCE | 2015年 / 109卷

关键词：

Single layer graphene sheet; Molecular Dynamics simulation; Crack propagation; Self heal; MOLECULAR-DYNAMICS; MECHANICAL-PROPERTIES; ELASTIC PROPERTIES; TRANSISTORS; TEMPERATURE; SHEETS;

D O I：

10.1016/j.commatsci.2015.05.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Molecular Dynamics simulations revealed the phenomena of self healing of cracks which were generated in graphene on application of tensile load exceeding its ultimate tensile strength. The phenomenon of self healing was observed when the system was studied at a very slow rate of 0.05 ps. Cracks initiated in the graphene sheet was allowed to propagate till it reached a critical length following which the load was removed and the sheet was relaxed. The study revealed that self healing of cracks took place within a critical crack opening displacement range of 0.3-0.5 nm in absence of any external stimulus. However, the self healing phenomenon was found to be independent of crack length. This self healing phenomenon occurred not only in pristine graphene sheet, but also in presence of pre-existing vacancies. The mechanism of self healing has been explained by detailed bond length/angle distribution analysis. (C) 2015 Published by Elsevier B.V.

引用

页码：84 / 89

页数：6

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