Thermal conductivity of an ultrathin carbon nanotube with an X-shaped junction

F. Y. Meng, Shigenobu Ogata, D. S. Xu, Y. Shibutani, and S. Q. Shi

Phys. Rev. B 75, 205403 – Published 1 May 2007

Abstract

The thermal conductivity of the ultrathin carbon nanotube with and without an X-shaped junction was investigated using nonequilibrium molecular-dynamics simulations. The ultrathin carbon nanotube exhibits superhigh thermal conductivity. The thermal conductivity of the nanotube with junctions was 20–80% less than that of a straight nanotube depending on temperature. There is a jump in the temperature profile around the junction, contributing to a larger temperature gradient and reduction in the thermal conductivity. The thermal conductivity of armchair nanotube junctions is sensitive to the topological structures at the junction region.

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Received 8 November 2006

DOI:https://doi.org/10.1103/PhysRevB.75.205403

Authors & Affiliations

F. Y. Meng^1,3,*, Shigenobu Ogata^1,2,†, D. S. Xu³, Y. Shibutani¹, and S. Q. Shi⁴

¹Department of Mechanical Engineering, Graduate of Osaka University, 2-1 Yamadaoka Suita, Osaka 565-0871, Japan
²Center for Atomic and Molecular Technologies, Graduate of Osaka University, 2-1 Yamadaoka Suita, Osaka 565-0871, Japan
³Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China
⁴Department of Mechanical Engineering, Hong Kong Polytechnic University, Hong Kong, China

^*Electronic address: meng@comec.mech.eng.osaka-u.ac.jp
^†Electronic address: ogata@mech.eng.osaka-u.ac.jp

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Vol. 75, Iss. 20 — 15 May 2007

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