Volume 98, Number 1, April 2012
|Number of page(s)||5|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||12 April 2012|
Self-healing of fractured one-dimensional brittle nanostructures
Department of Mechanical Engineering, Curtin University - Perth, WA 6845, Australia
2 School of Physics and Nuclear Energy Engineering, Beihang University - Beijing 100191, China
3 School of Aeronautics Science and Engineering, Beihang University - Beijing 100191, China
4 State Key Laboratory of Nonlinear Mechanics (LNM), Institute of Mechanics, Chinese Academy of Sciences Beijing 100190, China
5 Department of Mechanical and Biomedical Engineering, City University of Hong Kong Kowloon, Hong Kong, China
6 School of Aerospace, Mechanical and Mechatronic Engineering, University of Sydney Sydney, NSW 2006, Australia
7 School of Engineering, Brown University - Providence, RI 02912, USA
Accepted: 14 March 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 self-healing process. As the distance between two fracture surfaces becomes less than 1.0 nm, a strong surface attraction is generated by the electrostatic interaction, which results in Ga–As re-bonding at the fracture site and restoration of the nanowire. The results suggest that self-healing might be prevalent in ultrathin one-dimensional nanostructures under near vacuum conditions.
PACS: 62.23.Hj – Nanowires / 62.25.-g – Mechanical properties of nanoscale systems / 61.46.-W –
© EPLA, 2012
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