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The specific heat and the radial thermal expansion of bundles of single-walled carbon nanotubes
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2012 (English)In: Low temperature physics (Woodbury, N.Y., Print), ISSN 1063-777X, Vol. 38, no 6, 523-528 p.Article in journal (Refereed) Published
Abstract [en]

The specific heat at constant pressure C(T) of bundles of single-walled carbon nanotubes (SWNTs) closed at their ends has been investigated in the temperature interval of 2–120 K. It is found that the curve C(T) has features near 5, 36, 80, and 100 K. The experimental results on the C(T) and the radial thermal expansion coefficient αR(T) of bundles of SWNTs oriented perpendicular to the sample axis have been compared. It is found that the curves C(T) and αR(T) exhibit a similar temperature behavior at T > 10 K. The temperature dependence of the Grüneisen coefficient γ(T) has been calculated. The curve γ(T) also has a feature near 36 K. Above 36 K the Grüneisen coefficient is practically independent of temperature (γ ≈ 4). Below 36 K, γ(T) decreases monotonically with lowering temperature and becomes negative at T < 6 K.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2012. Vol. 38, no 6, 523-528 p.
Keyword [en]
single-walled carbon nanotubes, specific heat, heat capacity, thermal expansion
National Category
Condensed Matter Physics
Research subject
Physics Of Matter
URN: urn:nbn:se:umu:diva-64526DOI: 10.1063/1.4723677OAI: diva2:602126
Swedish Research Council, 621-2010-3732

Simultaneous publication in Fizika Nizkikh Temperatur volume 38, issue 6, pages 667-673 (2012).

Available from: 2013-02-01 Created: 2013-01-31 Last updated: 2014-02-27Bibliographically approved

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Sundqvist, Bertil
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