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Synthesis and field-emission properties of roselike ZnO nanostructures

  • L. L. Xu
  • , X. L. Wu
  • , X. Xiong
  • , J. Zhu
  • , H. T. Chen
  • , G. S. Huang
  • , P. K. Chu

    Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

    Abstract

    Self-assembled roselike ZnO nanostructures were synthesized via thermal evaporation of zinc powders without catalytic assistance at the relatively low temperature of 550 °C. The roselike structures consist of a large number of ZnO nanorods that uniformly arrange into hexagonal multilayers. The spontaneous nanoindentation effects under geometric constraints can be used to explain the structures. The cathodoluminescence spectra show a wide visible emission band related to Zn interstitials and oxygen vacancies. Field emission measurements demonstrate that the roselike ZnO nanostructures possess good electron emission characteristics with a turn-on field of 4.3 V/μm. © 2008 Springer-Verlag.
    Original languageEnglish
    Pages (from-to)247-250
    JournalApplied Physics A: Materials Science and Processing
    Volume91
    Issue number2
    DOIs
    Publication statusPublished - May 2008

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