### 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 |
---|---|

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 |

### Fingerprint

### Keywords

- Heat capacity
- One-dimensional periodic phase of nitrogen molecules
- Single-walled carbon nanotubes bundles

### ASJC Scopus subject areas

- Physics and Astronomy(all)

### Cite this

*Fizika Nizkikh Temperatur*,

*39*(5), 568-573.