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Published on: February 19, 2016
Effect of strain engineering on superlubricity in a double-walled carbon nanotube
Jiahao Li1, Yong Peng1, Xianqiong Tang2
1Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China. lichunbai@csu.edu.cn and National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Central South University, Changsha, 410075, China.
Abstract:
Double-walled carbon nanotubes (DWCNTs) have received a great deal of attention due to their great potential in the field of superlubricity. However, this superlubricity is susceptible to failure in practical applications due to the introduction of various defects. Here, a novel method based on strain engineering is employed for achieving superlubricity in the DWCNT using molecular dynamics simulations. The DWCNT exhibits a superlow friction force when an inner tube slides against a stretched outer tube even with a low content of defects. However, strain engineering shows its limitation on superlubricity in the case of a large magnitude of strain or a high content of point defects. The mechanism of superlubricity in the DWCNT could be explained by the analysis of the energy barrier.
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