Low Temperature Physics: 37, 343 (2011); https://doi.org/10.1063/1.3592703 (4 pages)
Fizika Nizkikh Temperatur: Volume 37, Number 4 (April 2011), p. 438-442    ( to contents , go back )

The effect of O2 impurities on the low-temperature radial thermal expansion of bundles of closed single-walled carbon nanotubes

A.V. Dolbin, V.B. Esel'son, V.G. Gavrilko, V.G. Manzhelii, S.N. Popov, and N.A.Vinnikov

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

B. Sundqvist

Department of Physics, Umea University, SE - 901 87 Umea, Sweden
pos Анотація:

Received September 17, 2010

Abstract

The effect of oxygen impurities upon the radial thermal expansion αr of bundles of closed single-walled carbon nanotubes has been investigated in the temperature interval 2.2–48 K by the dilatometric method. Saturation of bundles of nanotubes with oxygen caused an increase in the positive αr-values in the whole interval of temperatures used. Also, several peaks appeared in the temperature dependence αr(T) above 20 K. The low temperature desorption of oxygen from powders consisting of bundles of single-walled nanotubes with open and closed ends has been investigated.

PACS: 65.80.+n Thermal properties of small particles, nanocrystals, nanotubes.

Key words: Single-walled carbon nanotubes, O2, bundles of carbon nanotubes, radial thermal expansion.

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