Effect of substrate on thermal conductivity of single-walled carbon nanotubesA. V. Savin1, 2, Y. S. Kivshar2 and B. Hu3, 4
1 Semenov Institute of Chemical Physics, Russian Academy of Sciences - Moscow 119991, Russia
2 Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University Canberra, ACT 0200, Australia
3 Department of Physics and Center for Nonlinear Studies, Hong Kong Baptist University - Hong Kong, China
4 Department of Physics, University of Houston - Houston, TX 77204-5005, USA
received 10 June 2009; accepted in final form 9 October 2009; published October 2009
published online 9 November 2009
We analyze numerically the thermal conductivity of single-walled carbon nanotubes placed on a flat rigid substrate. We demonstrate that the character of thermal conductivity depends crucially on the interaction between the nanotube and the substrate. In particular, we reveal that unlike the well-established anomalous thermal conductivity of isolated carbon nanotubes, the nanotube placed on a substrate demonstrates normal thermal conductivity due to the appearance of a narrow gap in the frequency spectrum of acoustic phonons.
65.80.+n - Thermal properties of small particles, nanocrystals, and nanotubes.
63.22.Gh - Nanotubes and nanowires.
© EPLA 2009