H2 sorption by the bundles of single-wall carbon nanotubes irradiated in varions gas media
A.V. Dolbin, V.B. Esel'son, V.G. Gavrilko, V.G. Manzhelii, 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
I.I. Yaskovets, I.Yu. Uvarova, N.A. Tripachko, and B.A. Danilchenko
Institute of Physics, National Academy of Sciences of Ukraine, 46 Nauka Ave., Kyiv 03028, Ukraine pos Анотація:
Received January 14, 2013
The effect of radioactive irradiation on H2 sorption by the bundles of single-wall carbon nanotubes (SWNTs) has been investigated in various gas media. The samples were irradiated with γ-quanta (1.2 MeV) of 60Co ((1.5–1.7)·107 rad) at room temperature in the atmosphere of deuterium, nitrogen and oxygen (P = 1 atm) and in vacuum. The processes of H2 sorption and desorption in the SWNT bundles were investigated before and after irradiation in the temperature interval 12–1270 K. It is found that irradiation in a gas environment has a significant effect both on the low-temperature H2 sorption induced by the weak physical interaction and the chemical H2 sorption by the SWNT bundles. A phenomenological model has been proposed to explain the defect generation in carbon nanotubes irradiated in gas media.
PACS: 65.80.+n Thermal properties of small particles, nanocrystals, and nanotubes; PACS: 61.46.Fg Nanotubes.
Key words: single-walled carbon nanotubes, radioactive irradiation, H2 sorption, gas environment.