The low-temperature specific heat of MWCNTs

V. V. Sumarokov, A. Jeżowski, D. Szewczyk, M. I. Bagatski, M. S. Barabashko, A. N. Ponomarev, V. L. Kuznetsov, S. I. Moseenkov

Research output: Contribution to journalArticle

Abstract

The specific heat of multi-walled carbon nanotubes (MWCNTs) with a low defectiveness and with a low content of inorganic impurities has been measured in the temperature range from 1.8 to 275 K by the thermal relaxation method. The elemental composition and morphology of the MWCNTs were determined using scanning electron microscopy analysis and energy dispersion x-ray spectroscopy. The MWCNTs were prepared by chemical catalytic vapor deposition and have mean diameters from 7 nm up to 18 nm and lengths in some tens of microns. MWCNTs purity is over 99.4 at.%. The mass of the samples ranged from 2–4 mg. It was found that the temperature dependence of the specific heat of the MWCNTs differs significantly from other carbon materials (graphene, bundles of SWCNTs, graphite, diamond) at low temperatures. The specific heat of MWCNTs systematically decreases with increasing diameter of the tubes at low temperatures. The character of the temperature dependence of the specific heat of the MWCNTs with different diameters demonstrates the manifestation of different dimensions from 1D to 3D, depending on the temperature regions. The crossover temperatures are about 6 and 40 K. In the vicinity of these temperatures, a hysteresis is observed.

Original languageEnglish
Pages (from-to)395-403
Number of pages9
JournalFizika Nizkikh Temperatur
Volume45
Issue number3
DOIs
Publication statusPublished - 1 Mar 2019

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carbon nanotubes
specific heat
temperature dependence
temperature
x ray spectroscopy
bundles
crossovers
graphene
purity
graphite
diamonds
hysteresis
vapor deposition
tubes
impurities
scanning electron microscopy
carbon
energy

Keywords

  • Carbon nanotubes
  • Low-dimensional systems
  • MWCNTs
  • Specific heat

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Sumarokov, V. V., Jeżowski, A., Szewczyk, D., Bagatski, M. I., Barabashko, M. S., Ponomarev, A. N., ... Moseenkov, S. I. (2019). The low-temperature specific heat of MWCNTs. Fizika Nizkikh Temperatur, 45(3), 395-403. https://doi.org/10.1063/1.5090094

The low-temperature specific heat of MWCNTs. / Sumarokov, V. V.; Jeżowski, A.; Szewczyk, D.; Bagatski, M. I.; Barabashko, M. S.; Ponomarev, A. N.; Kuznetsov, V. L.; Moseenkov, S. I.

In: Fizika Nizkikh Temperatur, Vol. 45, No. 3, 01.03.2019, p. 395-403.

Research output: Contribution to journalArticle

Sumarokov, VV, Jeżowski, A, Szewczyk, D, Bagatski, MI, Barabashko, MS, Ponomarev, AN, Kuznetsov, VL & Moseenkov, SI 2019, 'The low-temperature specific heat of MWCNTs', Fizika Nizkikh Temperatur, vol. 45, no. 3, pp. 395-403. https://doi.org/10.1063/1.5090094
Sumarokov VV, Jeżowski A, Szewczyk D, Bagatski MI, Barabashko MS, Ponomarev AN et al. The low-temperature specific heat of MWCNTs. Fizika Nizkikh Temperatur. 2019 Mar 1;45(3):395-403. https://doi.org/10.1063/1.5090094
Sumarokov, V. V. ; Jeżowski, A. ; Szewczyk, D. ; Bagatski, M. I. ; Barabashko, M. S. ; Ponomarev, A. N. ; Kuznetsov, V. L. ; Moseenkov, S. I. / The low-temperature specific heat of MWCNTs. In: Fizika Nizkikh Temperatur. 2019 ; Vol. 45, No. 3. pp. 395-403.
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