Desorption kinetics and interaction of Xe with single-wall carbon nanotube bundles
| Autor: | Gunnar Moos, Jennah K. Kriebel, Tobias Hertel, Hendrik Ulbricht |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Thermal desorption spectroscopy Binding energy Condensed Matter (cond-mat) Analytical chemistry General Physics and Astronomy chemistry.chemical_element FOS: Physical sciences Condensed Matter Carbon nanotube law.invention Adsorption Xenon chemistry law Desorption Monolayer Graphite Physical and Theoretical Chemistry |
| DOI: | 10.48550/arxiv.cond-mat/0204175 |
| Popis: | 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. Comment: 8 pages, 5 figures |
| Databáze: | OpenAIRE |
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