Surface facetting and polarity of alumina

L. A. Bursill, Peng Ju Lin, David Smith

    Research output: Contribution to journalLetterpeer-review

    17 Scopus citations


    Atomic-resolution electron microscopic images of ruby show (0001) polar surface facets developing under electron irradiation. Attempts to understand the "dark-line" contrasts associated with the surface atom profiles, following comparison of the experimental images with computer modelling, leads to the realization that aluminium atom and oxygen atom surface terminations may be distinguished. Hence surface polarity, as well as details of surface step structure and mobility, may be determined. Positive surface polarity is preferred.

    Original languageEnglish (US)
    Pages (from-to)223-227
    Number of pages5
    Issue number2
    StatePublished - 1987

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Atomic and Molecular Physics, and Optics
    • Instrumentation


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