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  • APL Cover Image Selected on ZnO Nanomaterials by Prof. Zhao's Group
    Author:   | Date:2006-04-17   | Click Rate:    | 【Close
         A paper on ZnO nanomaterial synthesis by Professor ZHAO Ya-Pu's group has been accepted for publication recently by Applied Physics Letters (APL, ISI Impact Fact=4.308), and one picture in this paper has been selected by the editor-in-chief of APL as the "Cover Image" for APL May 8 issue.

        The APL reviewer commented: "This paper describes the synthesis of a very interesting and particular ZnO nano tetrapods with crown-shaped caps. The authors provide very clear evidences about the growth of such peculiar quasi 1-D nanostructure by following different stage during the formation of the nanotetrapods. They also made optical property characterization of their products. Their results should be interesting to a wide community."

        Recently, one-dimensional (1D) or quasi-1D ZnO nanostructured materials have received special attention due to their unique properties and numerous potential applications. High chemical stability, low threshold intensity, wide band-gap (3.37 eV) and large exciton binding energy (60 meV) make ZnO an excellent candidate for the fabrication of electronic and optoelectronic nanodevices. In order to obtain different ZnO nanostructured materials, varieties of methods have been developed. By far, a large number of ZnO nanostructured materials with different structures and morphologies have been synthesized, such as nanobelts, nanowires, nanospring, nanorods, nanocombs, tetrapod-like nanostructures, nanotubes, nanonails, nanosheets and nanohelices.

        ZnO nanotetrapods with hexagonal crown have been fabricated by Prof. Zhao's group via vapor transport process at a low temperature in argon atmosphere with a small amount of oxygen. The growth mechanism has been discussed in detail. XRD, SEM, HR-TEM and SAED analyses show that the as-produced samples are single crystal with uniform legs and large hexagonal crown. XRD pattern, Raman measurement and photoluminescence spectra of the nanotetrapods confirm that the as-grown products were wurtzite structured ZnO with many oxygen vacancies. The products may have potential applications for electron nanoconductors in multichannel optoelectronic devices.
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