Graphene heals thy cracks

Debroy, S and Miriyala, V P K and K, Vijaya Sekhar and Acharyya, S G and Acharyya, Amit (2015) Graphene heals thy cracks. Computational Materials Science, 109. pp. 84-89. ISSN 0927-0256

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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.

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IITH Creators:
IITH CreatorsORCiD
Acharyya, Amit
Item Type: Article
Uncontrolled Keywords: Single layer graphene sheet; Molecular Dynamics simulation; Crack propagation; Self heal
Subjects: Others > Electricity
Divisions: Department of Electrical Engineering
Depositing User: Team Library
Date Deposited: 31 Jul 2015 06:29
Last Modified: 29 Aug 2017 10:52
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