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Self-healing in fractured GaAs nanowires

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Open access
Authors
Wang, Jun
Lu, Chunsheng
Wang, Q.
Xiao, P.
Ke, F.
Bai, Y.
Shen, Y.
Wang, Y.
Chen, B.
Liao, X.
Gao, H.
Date
2012
Type
Journal Article

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Wang, Jun and Lu, Chunsheng and Wang, Qi and Xiao, Pan and Ke, Fujiu and Bai, Yilong and Shen, Yaogen and Wang, Yanbo and Chen, Bin and Liao, Xiaozhou and Gao, Huajian. 2012. Self-healing in fractured GaAs nanowires. Acta Materialia. 60 (15): pp. 5593-5600.
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Acta Materialia
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NOTICE: this is the author’s version of a work that was accepted for publication in Acta Materialia. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Acta Materialia, Volume 60, Issue 15, September 2012, Pages 5593-5600. http://dx.doi.org/10.1016/j.actamat.2012.07.013

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Abstract

Molecular dynamics simulations are performed to investigate a spontaneous self-healing process in fractured GaAs nanowires with a zinc blende structure. The results show that such self-healing can indeed occur via rebonding of Ga and As atoms across the fracture surfaces, but it can be strongly influenced by several factors, including wire size, number of healing cycles, temperature, fracture morphology, oriented attachment and atomic diffusion. For example, it is found that the self-healing capacity is reduced by 46% as the lateral dimension of the wire increases from 2.3 to 9.2 nm, and by 64% after 24 repeated cycles of fracture and healing. Other factors influencing the self-healing behavior are also discussed.