Desorption kinetics and interaction of Xe with single-wall carbon nanotube bundles

Abstract

We present a study on the kinetics of xenon desorption from single-wall carbon nanotube (SWNT) bundles using thermal desorption spectroscopy (TDS). TD-spectra from SWNT samples show a broad desorption feature peaked at significantly higher temperature than the corresponding low-coverage desorption feature on graphite. The observations are explained using a coupled desorption-diffusion (CDD) model, which allows the determination of the low-coverage Xe binding energy for adsorption on SWNT bundles, 27 kJ/mol. This energy is about 25% higher than the monolayer binding energy on graphite, 21.9 kJ/mol. By comparison with molecular mechanics calculations we find that this increase of the binding energy is consistent with adsorption in highly coordinated groove-sites on the external bundle surface.

8 pages, 5 figures

References in corpus (2)

• Charge-carrier dynamics in single-wall carbon nanotube bundles: A time-domain study
• Phases of Neon, Xenon, and Methane adsorbed on nanotube bundles

Cited by in corpus (5)

• The interlayer cohesive energy of graphite from thermal desorption of polyaromatic hydrocarbons
• A Mechanical Mass Sensor with Yoctogram Resolution
• Atomic monolayer deposition on the surface of nanotube mechanical resonators
• The effect of sorbed hydrogen on low temperature radial thermal expansion of single walled carbon nanotube bundles
• Breakdown of Kinetic Compensation Effect in Physical Desorption