Nano Archive

Thermal conductance of an individual single-wall carbon nanotube above room temperature

Pop, E and Mann, D and Wang, Q and Goodson, Kenneth E. and Dai, Hongjie (2006) Thermal conductance of an individual single-wall carbon nanotube above room temperature. NANO LETTERS, 6 (1). pp. 96-100.

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The thermal properties of a suspended metallic single-wall carbon nanotube (SWNT) are extracted from its high-bias (l-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(-1)K(-1) at room temperature for a SWNT of length 2.6 mu m 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.

Item Type:Article
Uncontrolled Keywords:Inorganic compounds ; Singlewalled nanotube ; Carbon nanotubes ; Nanostructured materials ; Digital simulation ; Size effect ; Modelling ; Phonon scattering ; Scanning electron microscopy ; Joule heating ; Temperature dependence ; IV characteristic ; Thermal conductivity ; Experimental study ;
Subjects:Physical Science > Nanophysics
Technology > Nanotechnology and energy applications
ID Code:2741
Deposited By:Lesley Tobin
Deposited On:20 Jan 2009 11:33
Last Modified:03 Mar 2009 13:21

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