Turning Carbon Nanotubes from Exceptional Heat Conductors into Insulators

Ravi S. Prasher, X. J. Hu, Y. Chalopin, Natalio Mingo, K. Lofgreen, S. Volz, F. Cleri, and Pawel Keblinski
Phys. Rev. Lett. 102, 105901 – Published 11 March 2009

Abstract

Thermal conductivity (κ) of isolated carbon nanotubes (CNTs) is higher than the κ of diamond; however, in this Letter we show that the κ of a packed bed of three-dimensional random networks of single and multiwall CNTs is smaller than that of thermally insulating amorphous polymers. The thermoelectric power (Σ) of the random network of CNTs was also measured. The Σ of a single wall nanotube network is very similar to that of isolated nanotubes and, in contrast with κ, Σ shows a strong dependence on the tube diameter.

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  • Received 29 September 2008

DOI:https://doi.org/10.1103/PhysRevLett.102.105901

©2009 American Physical Society

Authors & Affiliations

Ravi S. Prasher1,*, X. J. Hu2, Y. Chalopin3, Natalio Mingo4, K. Lofgreen1, S. Volz3, F. Cleri5, and Pawel Keblinski6,†

  • 1Department of Mechanical and Aerospace Engineering, Arizona State University, Tempe, Arizona, USA
  • 2School of Power and Mechanical Engineering, Wuhan University, Wuhan, Hubei, China
  • 3Laboratoire d’Energétique Moléculaire et Macroscopique, CNRS UPR 288, Ecole Centrale Paris, France
  • 4LITEN, CEA-Grenoble, 17 rue des Martyrs, 3804 Grenoble Cedex 9, France
  • 5Institut d’Electronique Microélectronique et Nanotechnologie (CNRS UMR 8520), Université de Sciences et Technologies de Lille, France
  • 6Department of Materials Science & Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA

  • *Corresponding author. ravi.s.prasher@intel.com
  • Corresponding author. keblip@rpi.edu

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Issue

Vol. 102, Iss. 10 — 13 March 2009

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