Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 134, Issue 1, Pages -Publisher
AIP Publishing
DOI: 10.1063/1.3518981
Keywords
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Funding
- European Community
- EURATOM
- CEA
- French Research Federation
- French Research Agency (ANR) [ANR-06-BLAN-0008-01]
- Agence Nationale de la Recherche (ANR) [ANR-06-BLAN-0008] Funding Source: Agence Nationale de la Recherche (ANR)
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The interaction of H atoms having relatively low average kinetic energy (similar to 0.025 eV) with both perfectly clean and D-covered HOPG surfaces is investigated using high resolution electron energy loss spectroscopy. From this study we confirm, in a controlled fashion, the presence of the theoretically predicted adsorption barrier since no adsorption is detected for such H atoms on HOPG. Moreover, we demonstrate that the exposure of a D saturated HOPG surface to these H atoms results in the complete removal of adatoms, with no further adsorption despite the prediction of the adsorption barrier to vanish for H dimers in para configuration. Therefore, the recombinative abstraction mechanism which competes with the adsorption process is more efficient. (C) 2011 American Institute of Physics. [doi:10.1063/1.3518981]
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