Thermal Conductance of an Individual Single-Wall Carbon Nanotube above Room Temperature
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- 22 December 2005
- journal article
- letter
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 6 (1) , 96-100
- https://doi.org/10.1021/nl052145f
Abstract
The thermal properties of a suspended metallic single-wall carbon nanotube (SWNT) are extracted from its high-bias (I−V) electrical characteristics over the 300−800 K temperature range, achieved by Joule self-heating. The thermal conductance is approximately 2.4 nW/K, and the thermal conductivity is nearly 3500 Wm-1K-1 at room temperature for a SWNT of length 2.6 μm and diameter 1.7 nm. A subtle decrease in thermal conductivity steeper than 1/T is observed at the upper end of the temperature range, which is attributed to second-order three-phonon scattering between two acoustic modes and one optical mode. We discuss sources of uncertainty and propose a simple analytical model for the SWNT thermal conductivity including length and temperature dependence.Keywords
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