Self-healing of GaAs nanowires: An atomistic study
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Fractured GaAs nanowires (NWs) with a zinc-blende structure can spontaneously self-heal throughout Ga–As re-bonding at fracture sites. In this paper, a systematic molecular dynamics study has been made with focus on the influence of lateral dimensions of GaAs NWs, multiple fractures and atomistic diffusion on the self-healing process. The results show that, as the lateral dimension increases from 2.31 to 9.23 nm, GaAs NWs lose their 46.0% capacity of self-healing. After 24 repeated cycles of fracture, the restored tensile strength of a NW reduces by 64.4%. Atomistic diffusion enhances the healing efficiency by eliminating mismatch of atoms.
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Wang, Jun; Lu, Chunsheng; Wang, Q.; Xiao, P.; Ke, F.; Bai, Y.; Shen, Y.; Wang, Y.; Chen, B.; Liao, X.; Gao, H. (2012)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 ...
Tian, Biming; Han, Song; Parvin, Sazia; Hu, J.; Das, S. (2011)The objective of self-healing key distribution is to enable group users to recover session keys by themselves, without requesting additional transmissions from the group manager (GM), even when they miss some broadcast ...
Wang, Jun; Lu, Chungsheng; Wang, Q.; Xiao, P.; Ke, F.; Bai, Y.; Shen, Y.; Wang, Y.; Liao, X.; Gao, H. (2012)Recent experiments have shown that fractured GaAs nanowires can heal spontaneously inside a transmission electron microscope. Here we perform molecular-dynamics simulations to investigate the atomic mechanism of this ...