Low Temperature Physics: 40, 246 (2014); https://doi.org/10.1063/1.4868528
Fizika Nizkikh Temperatur: Volume 40, Number 3 (March 2014), p. 317-323    ( to contents , go back )

Kinetics of 3Не, 4Не, Н2, D2, Ne and N2 sorption by bundles of single-walled carbon nanotubes. Quantum effects

A.V. Dolbin, V.B. Esel’son, V.G. Gavrilko, V.G. Manzhelii, N.A. Vinnikov, R.M. Basnukaeva

B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine 47 Lenin Ave., Kharkov 61103, Ukraine
E-mail: dolbin@ilt.kharkov.ua

I.I. Yaskovets, I.Yu. Uvarova, and B.A. Danilchenko

Institute of Physics, National Academy of Sciences of Ukraine Prospect Nauky 46, Kyiv, UKRAINE, 03028
pos Анотація:

Received June 26, 2013

Abstract

The low-temperature kinetics of sorption of 3He, 4He, H2, D2, Ne and N2 gases by bundles of single-walled carbon nanotubes with closed ends (c-SWNT) and the subsequent desorption of these gases from the c-SWNT bundles has been investigated. The characteristic times of the sorption–desorption processes coincide within the experimental error. The prior anneal-ing of the SWNT samples at T = 500 °C reduced significantly the characteristic times and changed their temperature dependences. The effect of annealing decreased with increasing the molecular weight of the dissolved gas. Below 16 K the times of 3He, 4He, H2, D2 sorption were only slightly dependent on temperature, which suggests a tunnel character of the sorption of these impurities by c-SWNT bundles. The influence of irradiation of c-SWNT bundles with γ quanta upon H2 sorption is qualitatively similar to annealing effect.

PACS: 68.43.Jk Diffusion of adsorbates, kinetics of coarsening and aggregation;
PACS: 68.43.Mn Adsorption kinetics;
PACS: 61.46.Fg Nanotubes.

Key words: carbon nanotubes, quantum diffusion, sorption kinetic.

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