Abstract
Surface EXAFS has been used to investigate the potassium adsorption site on the oxygen-terminated polar (000 1) face of ZnO. A KO distance of 2.70 ± 0.04 A ̊ 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.
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