Abstract
Low-coverage adsorption isotherms for on single-walled carbon nanotube bundles have been measured at eight temperatures between 155 and 195 K. The nanotubes used in this study were untreated, so that the tubes have closed ends. The isosteric heat of adsorption was determined from the isotherms and, from this quantity, the binding energy of the methane on the nanotube substrate was obtained. The binding energy was found to be 76% larger on the nanotube bundles than it is on planar graphite.
- Received 7 June 1999
DOI:https://doi.org/10.1103/PhysRevB.61.13150
©2000 American Physical Society