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Li J, Peng Y, Tang X, Xu Q, Bai L. Effect of strain engineering on superlubricity in a double-walled carbon nanotube. Phys Chem Chem Phys 2021; 23:4988-5000. [PMID: 33621296 DOI: 10.1039/d0cp06052f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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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Affiliation(s)
- Jiahao Li
- Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China. and National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Central South University, Changsha, 410075, China
| | - Yong Peng
- Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China. and National & Local Joint Engineering Research Center of Safety Technology for Rail Vehicle, Central South University, Changsha, 410075, China
| | - Xianqiong Tang
- Department of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
| | - Qian Xu
- Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China. and Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha, 410075, China
| | - Lichun Bai
- Key Laboratory of Traffic Safety on Track (Central South University), Ministry of Education, School of Traffic & Transportation Engineering, Central South University, Changsha, 410075, China. and Joint International Research Laboratory of Key Technology for Rail Traffic Safety, Central South University, Changsha, 410075, China
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