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    Size-dependent brittle-to-ductile transition in GaAs nano-rods

    Access Status
    Fulltext not available
    Authors
    Wang, J.
    Shen, Y.
    Song, F.
    Ke, F.
    Bai, Y.
    Lu, Chunsheng
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wang, J. and Shen, Y. and Song, F. and Ke, F. and Bai, Y. and Lu, C. 2014. Size-dependent brittle-to-ductile transition in GaAs nano-rods. Engineering Fracture Mechanics. 150: pp. 135-142.
    Source Title
    Engineering Fracture Mechanics
    DOI
    10.1016/j.engfracmech.2015.04.006
    ISSN
    0013-7944
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/23217
    Collection
    • Curtin Research Publications
    Abstract

    GaAs is brittle at room temperature at the macro-scale; however, ductility emerges when its characteristic dimension reduces to the nano-scale. Using molecular dynamics simulations, we reveal that there is a brittle-to-ductile transition in GaAs nano-rods due to the competition between generation of cracks and initiation of dislocations. Such a competition is sensitive to aspect ratios of nano-rods. These results well explain experimentally observed ductility of GaAs nano-rods and have important implications for the design of semiconductor materials with tailored mechanical properties.

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