Growth and characterization of Zn-ZnO core-shell polygon prismatic nanocrystals on Si

Abstract Zn precursor synthesized from Zn(ClO 4 ) 2 solution was used as nucleation seeds for the growth of Zn polygon prismatic nanocrystals on silicon via a thermal vapor transport at low temperatures of 150–400°C (substrate) in Ar atmosphere. Depending on different reaction temperature and atmosphere, Zn–ZnO core-shell polygon prismatic nanocrystals with a dimension from nanometer to micrometer can be developed as evidenced from high-resolution transmission electron microscopy and auger nanoprobe electron spectroscopy analysis. The Zn–ZnO polygon prismatic structure shows weak UV emission and strong deep-level emission. However, photoluminescence properties and crystallization of Zn–ZnO prismatic nanocrystals could be improved by suitable post-treatment.

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