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Length dependence of carbon nanotube thermal conductivity and the "problem of long waves"We present the first calculations of finite length carbon nanotube thermal conductivity that extend from the ballistic to the diffusive regime, throughout a very wide range of lengths and temperatures. The long standing problem of vanishing scattering of the "long wavelength phonf dramatically here, making the thermal conductivity diverge as the nanotube length increases. We show that the divergence disappears if 3-phonon scattering processes are considered to second or higher order. Nevertheless, for defect free nanotubes, the thermal conductivity keeps increasing up to very large lengths (10 gm at 300 K). Defects in the nanotube are also able to remove the long wavelength divergence.
Document ID
20050231775
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Mingo, N.
(NASA Ames Research Center Moffett Field, CA United States)
Broido, D. A.
Date Acquired
August 23, 2013
Publication Date
July 1, 2005
Publication Information
Publication: Nano Lett
Volume: 5
Issue: 7
ISSN: 1530-6984
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
Evaluation Studies

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