title: Higher coverage gas adsorption on the surface of carbon nanotubes: evidence for a possible new phase in the second layer.
abstract: We present adsorption isotherm results for Ne, CH4, and Xe on bundles of close-ended single-wall carbon nanotubes, for coverages above the completion of the first layer. We find a small, sharp, substep present in the second-layer data for Ne and CH4, and a weaker feature, that produces an isothermal compressibility peak, for Xe. The size and location of the feature allows its tentative identification as a new, second-layer, one-dimensional phase, in which the atoms sit atop high binding energy sites in the second layer.
authors.affiliation: Department of Physics, Southern Illinois University, Carbondale 62901, USA.
authors.forename: S
authors.initials: S
authors.lastname: Talapatra
authors.forename: V
authors.initials: V
authors.lastname: Krungleviciute
authors.forename: A D
authors.initials: AD
authors.lastname: Migone