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Measuring the Thermal Conductivity of a Single Carbon Nanotube

by: Motoo Fujii, Xing Zhang, Huaqing Xie, Hiroki Ago, Koji Takahashi, Tatsuya Ikuta, Hidekazu Abe, Tetsuo Shimizu
Physical Review Letters, Vol. 95, No. 6. (Aug 2005), 065502, doi:10.1103/physrevlett.95.065502  Key: citeulike:1776529

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Abstract

Although the thermal properties of millimeter-sized carbon nanotube mats and packed carbon nanofibers have been readily measured, measurements for a single nanotube are extremely difficult. Here, we report a novel method that can reliably measure the thermal conductivity of a single carbon nanotube using a suspended sample-attached T-type nanosensor. Our experimental results show that the thermal conductivity of a carbon nanotube at room temperature increases as its diameter decreases, and exceeds 2000  W/mK for a diameter of 9.8 nm. The temperature dependence of the thermal conductivity for a carbon nanotube with a diameter of 16.1 nm appears to have an asymptote near 320 K. The present method is, in principle, applicable to any kind of a single nanofiber, nanowire, and even single-walled carbon nanotube.


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