Self-healing in fractured GaAs nanowires

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 infl...

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Bibliographic Details
Published in:Acta materialia 2012-09, Vol.60 (15), p.5593-5600
Main Authors: Wang, Jun, Lu, Chunsheng, Wang, Qi, Xiao, Pan, Ke, Fujiu, Bai, Yilong, Shen, Yaogen, Wang, Yanbo, Chen, Bin, Liao, Xiaozhou, Gao, Huajian
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
GaAs nanowires
Metals. Metallurgy
Molecular dynamics
Multiple healing
Self-healing
Size effect
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Summary: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 9.2nm, and by 64% after 24 repeated cycles of fracture and healing. Other factors influencing the self-healing behavior are also discussed.
ISSN:1359-6454
1873-2453
DOI:10.1016/j.actamat.2012.07.013