By highest-resolution dynamic scanning force microscopy operated in the non-contact mode, we reveal the complex stabilization mechanism of polar zinc-terminated ZnO(0001). The nanoscopic and atomic structures unveiled corroborate a model of stabilization via triangular structures. High-temperature preparation (T>13000.3em0exK) yields a phase with an additional stabilization by faceting in the form of highly ordered step arrays. The terraces between steps are partly covered with triangular reconstructions exhibiting exclusively 101̄0 nanofacets on step edges. Both mechanisms together allow a complete stabilization of the surface without the involvement of adsorbates.
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Ostendorf et al. (2008) studied this question.
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