Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5367924 | Applied Surface Science | 2008 | 5 Pages |
Abstract
The adsorption kinetics (by thermal desorption spectroscopy) and adsorption dynamics (by molecular beam scattering) have been determined for a number of alkanes, methanol, thiophene, and water on a silica wafer-SiO2/Si(1Â 1Â 1). No indications for bond activation were present, i.e., all probe molecules adsorb molecularly obeying 1st order kinetics. The coverage-dependent heat of adsorption has been determined accordingly. The adsorption dynamics are precursor-mediated with Kisliuk-like shapes of the adsorption probabilities at low impact energies and adsorbate-assisted adsorption at large impact energies.
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Authors
S. Funk, J. Goering, U. Burghaus,