Atomic scale step structure and orientation of a curved surface ZnO single crystal.

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ID: 99810
2020
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Abstract
We have investigated the surface structure of a curved ZnO-crystal, going from the (0001)-facet at 0° miscut to the (101¯4)-facet at a miscut of 24.8° using scanning tunneling microscopy and low energy electron diffraction. We find that the surface separates locally into (0001)-terraces and (101¯4)-facets, where the ratio between the facets depends on the miscut angle. In X-ray photoemission spectroscopy (XPS) the intensity of an O 1s component scaling with the step density of the surface is observed. No other facets were observed and the surface maintains a high degree of order over all angles. Such a curved ZnO crystal can be used for systematic studies relating the step density to the chemical reactivity using XPS to probe the curved surface at different positions.
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Authors Grånäs, Elin;Arndt, Björn;Seitz, Christoph;Wagstaffe, Michael;Stierle, Andreas;
Journal The Journal of Chemical Physics
Year 2020
DOI
10.1063/1.5138909
URL
Keywords
rotational spectroscopy. hydrogen bonding. self-aggregation. hydration of sugars

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