期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 24, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.245505
关键词
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资金
- National Science Foundation
- Office of Naval Research [N00014-11-1077]
- National Natural Science Foundation of China [61006090, 10990104, 60976092]
- NSFC [11002079]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [951145] Funding Source: National Science Foundation
The energetics of topological defects (TDs) in carbon nanotubes (CNTs) and their kinetic healing during the catalytic growth are explored theoretically. Our study indicates that, with the assistance of a metal catalyst, TDs formed during the addition of C atoms can be efficiently healed at the CNT-catalyst interface. Theoretically, a TD-free CNT wall with 10(8)-10(11) carbon atoms is achievable, and, as a consequence, the growth of perfect CNTs up to 0.1-100 cm long is possible since the linear density of a CNT is similar to 100 carbon atoms per nanometer. In addition, the calculation shows that, among catalysts most often used, Fe has the highest efficiency for defect healing.
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