Abstract
The heat capacity of bundles of closed-cap single-walled carbon nanotubes with one-dimensional chains of nitrogen molecules adsorbed in the grooves has been first experimentally studied at temperatures from 2 to 40 K using an adiabatic calorimeter. The contribution of nitrogen C N2 to the total heat capacity has been separated. In the region 28 K the behavior of the curve C N2 (T) is qualitatively similar to the theoretical prediction of the phonon heat capacity of 1D chains of Kr atoms localized in the grooves of SWNT bundles. Below 3 K the de-pendence C N2 (T) is linear. Above 8 K the dependence C N2 (T) becomes steeper in comparison with the case of Kr atoms. This behavior of the heat capacity C N2 (T) is due to the contribution of the rotational degrees of free-dom of the N 2 molecules.
Original language | English |
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Pages (from-to) | 568-573 |
Number of pages | 6 |
Journal | Fizika Nizkikh Temperatur |
Volume | 39 |
Issue number | 5 |
Publication status | Published - 1 May 2013 |
Externally published | Yes |
Keywords
- Heat capacity
- One-dimensional periodic phase of nitrogen molecules
- Single-walled carbon nanotubes bundles
ASJC Scopus subject areas
- Physics and Astronomy(all)