Abstract
The effect of a normal H2 impurity upon the radial thermal expansion αr of single-walled carbon nanotube (SWNT) bundles is investigated in the interval T=2.2–27K using the dilatometric method. It is found that H2 saturation of SWNT bundles causes a shift of the temperature interval of the negative thermal expansion towards lower temperatures (as compared to pure carbon nanotubes) and a sharp increase in the magnitude of αr in the whole range of temperatures investigated. The low temperature desorption of H2 from a powder consisting of bundles of SWNTs, open and closed at the ends, is investigated.
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