Abstract
Defect sites on oxide surfaces play a dominant role in surface chemistry. The direct atomistic study of these sites is important but very difficult. We have mimicked the adsorbateâdefect interaction by a dynamic force microscope tip measuring the interaction with a color center (F0) on the MgO(001) surface. The experimental findings, complemented by density functional theory calculations, show a highly attractive adsorbateâdefect interaction and a charge transfer at a critical distance.
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