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Thermal probing of energy dissipation in current-carrying carbon nanotubes

J. Appl. Phys. 105, 104306 (2009); doi:10.1063/1.3126708

Published 20 May 2009

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Li Shi,1 Jianhua Zhou,1 Philip Kim,2 Adrian Bachtold,3 Arun Majumdar,4 and Paul L. McEuen5
1Department of Mechanical Engineering and Center for Nano and Molecular Science and Technology, The University of Texas at Austin, Austin, Texas 78712, USA
2Department of Physics, Columbia University, New York, New York 10027, USA
3Centre d'Investigacions en Nanociencia i Nanotecnologia (Consejo Superior de Investigaciones Científicas–Institut Català de Nanotecnologia), Campus de la Universitat Autònoma de Barcelona (UAB), E-08193 Bellaterra, Spain
4Department of Mechanical Engineering, University of California, Berkeley, California 94720, USA and Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
5Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853 USA
The temperature distributions in current-carrying carbon nanotubes have been measured with a scanning thermal microscope. The obtained temperature profiles reveal diffusive and dissipative electron transport in multiwalled nanotubes and in single-walled nanotubes when the voltage bias was higher than the 0.1–0.2 eV optical phonon energy. Over 90% of the Joule heat in a multiwalled nanotube was found to be conducted along the nanotube to the two metal contacts. In comparison, about 80% of the Joule heat was transferred directly across the nanotube-substrate interface for single-walled nanotubes. The average temperature rise in the nanotubes is determined to be in the range of 5–42 K per microwatt Joule heat dissipation in the nanotubes. ©2009 American Institute of Physics
History: Received 10 December 2008; accepted 3 April 2009; published 20 May 2009
Permalink: http://link.aip.org/link/?JAPIAU/105/104306/1
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KEYWORDS and PACS

Keywords
PACS
  • 66.70.Lm
    Nonelectronic thermal conduction and heat-pulse propagation in other solids
  • 65.80.+n
    Thermal properties of small particles, nanocrystals, nanotubes
  • YEAR: 2009

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ISSN:
0021-8979 (print)   1089-7550 (online)
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