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Thermal Properties of Single-Walled Carbon Nanotubes

Published online by Cambridge University Press:  15 March 2011

J. Hone ,
B. Batlogg ,
Z. Benes ,
M.C. Llaguno ,
N.M. Nemes ,
A.T. Johnson  and
J.E. Fischer
J. Hone
Affiliation:
Department of Physics and Astronomy and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia PA 19104-6272
B. Batlogg
Affiliation:
Bell Laboratories, Lucent Technologies, Murray Hill, NJ 079743
Z. Benes
Affiliation:
Department of Materials Science and Engineering and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia PA 19104-6272
M.C. Llaguno
Affiliation:
Department of Physics and Astronomy and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia PA 19104-6272
N.M. Nemes
Affiliation:
Department of Physics and Astronomy and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia PA 19104-6272
A.T. Johnson
Affiliation:
Department of Physics and Astronomy and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia PA 19104-6272
J.E. Fischer
Affiliation:
Department of Materials Science and Engineering and Laboratory for Research on the Structure of Matter, University of Pennsylvania, Philadelphia PA 19104-6272
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Abstract

The thermal properties of carbon nanotubes are strongly dependent on their unique structure and size, and show promise as an ideal material for thermal management on the micro- and macro-scale. The specific heat of nanotubes is similar to that of two-dimensional graphene at high temperatures, but is sensitive to the effects of rolling the the graphene sheet into a small cylinder at low temperatures. Specifically, the acoustic phonon modes are stiffened due to the cylindrical geometry, and the phonon spectrum is quantized due to the small diameter of the tube. In bundles of single-walled nanotubes, the specific heat is a sensitive probe of inter-tube mechanical coupling. Measurements of the specific heat show that inter-tube coupling is relatively weak, and show direct evidence for quantum effects. The thermal conductivity of nanotubes should reflect the on-tube phonon structure. Aligned bundles of SWNTs show a high thermal conductivity (>200 W/m-K at room temperature), and possible quantization effects at low temperature.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 633: Symposium A – Nanotubes and Related Materials , 2000 , A17.1
Copyright
Copyright © Materials Research Society 2001

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