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    Electrical conductivity mechanisms in titania hollow microspheres with dominant {0 0 1} facets

    Access Status
    Fulltext not available
    Authors
    Georgakopoulos, T.
    Sofianos, Veronica
    Pomoni, K.
    Trapalis, C.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Georgakopoulos, T. and Sofianos, V. and Pomoni, K. and Trapalis, C. 2014. Electrical conductivity mechanisms in titania hollow microspheres with dominant {0 0 1} facets. Journal of Alloys and Compounds. 586: pp. 52-58.
    Source Title
    Journal of Alloys and Compounds
    DOI
    10.1016/j.jallcom.2013.10.031
    ISSN
    0925-8388
    School
    Department of Physics and Astronomy
    URI
    http://hdl.handle.net/20.500.11937/50445
    Collection
    • Curtin Research Publications
    Abstract

    Anatase titania hollow microspheres with dominant {0 0 1} facets were synthesized by a solvotherrmal-hydrothermal method. Two kinds of samples, as prepared and calcinated at 600 C, were fabricated. The temperature dependence of their electrical conductivity in vacuum and in air, in the temperature range 113-440 K, was investigated. The conductivity data were fitted using the grain boundary model (GB), the small polaron hopping (SPH) model and the Mott's variable range hopping model in the different temperature regimes, suggesting the contribution of several conduction mechanisms. A significant decrease of conductivity values in air is observed, indicating the influence of environment on titania hollow microspheres. In the temperature region 274-294 K a metal-like behavior in air is shown for the as prepared sample. © 2013 Elsevier B.V. All rights reserved.

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