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    On the wurtzite to tetragonal phase transformation in ZnO nanowires

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    Fulltext not available
    Authors
    Wang, J.
    Shen, Y.
    Song, F.
    Ke, F.
    Liao, X.
    Lu, Chunsheng
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, J. and Shen, Y. and Song, F. and Ke, F. and Liao, X. and Lu, C. 2017. On the wurtzite to tetragonal phase transformation in ZnO nanowires. Nanotechnology. 28: 165705.
    Source Title
    Nanotechnology
    DOI
    10.1088/1361-6528/aa6566
    ISSN
    1361-6528
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/51350
    Collection
    • Curtin Research Publications
    Abstract

    There is a long standing contradiction on the tensile response of zinc oxide nanowires between theoretical prediction and experimental observations. Although it is proposed that there is a ductile behavior dominated by phase transformation, only an elastic deformation and brittle fracture was witnessed in experiments. Using molecular dynamics simulations, we clarified that, as the lateral dimension of zinc oxide nanowires increases to a critical value, an unambiguous ductile-to-brittle transition occurs. The critical value increases with decreasing the strain rate. Factors including planar defects and surface contamination induce brittle fracture prior to the initiation of phase transformation. These findings are consistent with previous atomistic standpoints and experimental results.

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