Title of Paper:Temperature-dependent thermal conductivity of bent carbon nanotubes by molecular dynamics simulation

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Date of Publication:2011-05-15

Journal:JOURNAL OF APPLIED PHYSICS

Included Journals:SCIE、EI

Volume:109

Issue:10

ISSN No.:0021-8979

Abstract:Molecular dynamics simulations were performed to evaluate temperature-dependent thermal conductivity of bent carbon nanotubes. Thermal conductivities of bent nanotubes are predicted to be smaller than those of straight nanotubes. This is due to the suppression of high frequency phonons from the density of states calculations. It was found that for the defect-free bent nanotubes, the ratio of thermal conductivity of bent nanotubes to that of the straight ones are temperature and diameter independent, while significantly relies on the bent characteristic size. The more is the nanotube bent, the smaller is thermal conductivity obtained. For the larger nanotubes, the buckled defects were observed after bending and the ratio decrease rapidly. The ratios of thermal conductivity of the buckled nanotubes to that of the straight ones increase with the increasing temperatures until a maximum is obtained. (C) 2011 American Institute of Physics. [doi:10.1063/1.3592293]