Highly Site-SpecificAdsorption on VicinalSurfaces
- 21 December 1998
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 81 (25) , 5596-5599
- https://doi.org/10.1103/physrevlett.81.5596
Abstract
Experimental and theoretical results for the dissociative adsorption of on vicinal Si(001) surfaces are presented. Using optical second-harmonic generation, sticking probabilities at the step sites are found to exceed those on the terraces by up to 6 orders of magnitude. Density functional theory calculations indicate the presence of direct adsorption pathways for monohydride formation but with a dramatically lowered barrier for step adsorption due to an efficient rehybridization of dangling orbitals.
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