What atomic resolution annular dark field imaging can tell us about gold nanoparticles on TiO2 (1 1 0)

S. D. Findlay, N. Shibata, Y. Ikuhara

    Research output: Contribution to journalArticlepeer-review

    8 Citations (Scopus)

    Abstract

    Annular dark field scanning transmission electron microscopy imaging was recently applied to a catalyst consisting of gold nanoparticles on TiO2 (1 1 0), showing directly that the gold atoms in small nanoparticles preferentially attach to specific sites on the TiO2 (1 1 0) surface. Here, through simulation, a parameter exploration of the imaging conditions which maximise the visibility of such nanoparticles is presented. Aberration correction, finite source size and profile imaging are all considered while trying to extracting the maximum amount of information from a given sample. Comment is made on the role of the thermal vibration of the atoms in the nanoparticle, the magnitude of which is generally not known a priori but which affects the visibility of the nanoparticles in this imaging mode.

    Original languageEnglish
    Pages (from-to)1435-1446
    Number of pages12
    JournalUltramicroscopy
    Volume109
    Issue number12
    DOIs
    Publication statusPublished - 2009 Nov

    Keywords

    • Annular dark field (ADF)
    • Gold
    • Rutile
    • Scanning transmission electron microscopy (STEM)

    ASJC Scopus subject areas

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

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