Heat Capacity of 1D Molecular Chains

M. I. Bagatskii, M. S. Barabashko, V. V. Sumarokov, A. Jeżowski, P. Stachowiak

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8 Citations (Scopus)

Abstract

The heat capacity of 1D chains of nitrogen and methane molecules (adsorbed in the outer grooves of bundles of closed-cap single-walled carbon nanotubes) has been studied in the temperature ranges 2–40 and 2–60 K, respectively. The temperature dependence of the heat capacity of 1D chains of nitrogen molecules below 3 K is close to a linear. It was found that the rotational heat capacity of methane molecules is a significant part of the total heat capacity of the chains throughout the whole investigated temperature range, whereas in the case of nitrogen, the librations are significant only above 15 K. The dependence of the heat capacity for methane below 10 K indicates the presence of a Schottky anomaly caused by the tunneling between the lowest energy levels of the CH 4 molecule rotational spectra. Characteristic features observed in the temperature dependence of the heat capacity of 1D methane crystals are also discussed.

Original languageEnglish
Pages (from-to)113-123
Number of pages11
JournalJournal of Low Temperature Physics
Volume187
Issue number1-2
DOIs
Publication statusPublished - 1 Apr 2017

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Keywords

  • Heat capacity
  • One-dimensional molecular chains
  • Single-walled carbon nanotube bundles

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Bagatskii, M. I., Barabashko, M. S., Sumarokov, V. V., Jeżowski, A., & Stachowiak, P. (2017). Heat Capacity of 1D Molecular Chains. Journal of Low Temperature Physics, 187(1-2), 113-123. https://doi.org/10.1007/s10909-016-1737-z