Potassium bond site in ZnO(000 overline1) p(2 × 2) K
Abstract
Surface EXAFS has been used to investigate the potassium adsorption site on the oxygen-terminated polar (000 overline1) face of ZnO. A KO distance of 2.70 ± 0.04 Å is obtained from the KK-edge SEXAFS data. The polarisation dependence of the EXAFS amplitudes indicates that K absorbs in a three-fold hollow site. This is most likely a cave site in which K sits above Zn in the second layer, consistent with the prediction of previously published Madelung potential calculations.
- Publication:
-
Surface Science Letters
- Pub Date:
- 1993
- DOI:
- 10.1016/0167-2584(93)90904-W
- Bibcode:
- 1993SurSL.290L.680P