Journal
JOURNAL OF SUPERHARD MATERIALS
Volume 34, Issue 6, Pages 371-385Publisher
ALLERTON PRESS INC
DOI: 10.3103/S1063457612060111
Keywords
carbon nanotubes; pressure-induced polymerization; novel metastable carbons; electronic and mechanical characteristics
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Funding
- NBRPC [2011CB808205]
- NSFC [51121061, 91022029, 11174152]
- Science Foundation of Yanshan University [YSUSF201101]
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In this paper, we have reviewed the experimental and theoretical studies on pressure-induced polygonization, ovalization, racetrack-shape deformation, and polymerization of carbon nanotubes (CNTs). The corresponding electronic, optical, and mechanical changes accompanying these behaviors have been discussed. The transformations of armchair (n, n) CNT bundles (n = 2, 3, 4, 6, and 8) under hydrostatic or nonhydrostatic pressure into new carbons, including recently proposed superhard bct-C-4, Cco-C-8, and B-B(1)A(L2R2) carbon phases have also been demonstrated. Given the diversity of CNTs from various chiralities, diameters, and arrangements, pressure-induced CNT polymerization provides a promising approach to produce numerous novel metastable carbons exhibiting unique electronic, optical, and mechanical characteristics.
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