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|Title:||Self-repairing in single-walled carbon nanotubes by heat treatment||Authors:||Jiang, J.-W.
|Issue Date:||1-Sep-2010||Citation:||Jiang, J.-W., Wang, J.-S. (2010-09-01). Self-repairing in single-walled carbon nanotubes by heat treatment. Journal of Applied Physics 108 (5) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3481004||Abstract:||Structure transformation by heat treatment in single-walled carbon nanotubes (SWCNT) is investigated using molecular dynamics simulation. The critical temperature for the collapse of pure SWCNT is as high as 4655 K due to strong covalent carbon-carbon bonding. Above 2000 K, the cross section of SWCNT changes from circle to ellipse. The self-repairing capability is then investigated and two efficient processes are observed for the SWCNT to repair themselves. (1) In the first mechanism, vacancy defects aggregate to form a bigger hole, and a bottleneck junction is constructed nearby. (2) In the second mechanism, a local curvature is generated around the isolate vacancy to smooth the SWCNT. Benefit from the powerful self-repairing capability, defective SWCNT can seek a stable configuration at high temperatures; thus the critical temperature for collapse is insensitive to the vacancy defect density. © 2010 American Institute of Physics.||Source Title:||Journal of Applied Physics||URI:||http://scholarbank.nus.edu.sg/handle/10635/97899||ISSN:||00218979||DOI:||10.1063/1.3481004|
|Appears in Collections:||Staff Publications|
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