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Synthesis and field-emission properties of roselike ZnO nanostructures

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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.

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Authors and Affiliations

  1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China

    L.L. Xu, X.L. Wu, X. Xiong, J. Zhu, H.T. Chen & G.S. Huang

  2. Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Hong Kong, P.R. China

    P.K. Chu

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  1. L.L. Xu
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  2. X.L. Wu
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  3. X. Xiong
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  4. J. Zhu
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  5. H.T. Chen
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  6. G.S. Huang
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Correspondence to X.L. Wu.

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PACS

68.70.+w; 78.55.Cr; 81.05.Cy

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Xu, L., Wu, X., Xiong, X. et al. Synthesis and field-emission properties of roselike ZnO nanostructures. Appl. Phys. A 91, 247–250 (2008). https://doi.org/10.1007/s00339-008-4423-4

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  • DOI: https://doi.org/10.1007/s00339-008-4423-4

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