Determination of exact positions of individual tungsten atoms in unisize tungsten oxide clusters supported on carbon substrate by HAADF-STEM observation

Hisato Yasumatsu, Tetsuya Tohei, Yuichi Ikuhara

    Research output: Contribution to journalArticlepeer-review

    4 Citations (Scopus)

    Abstract

    The HAADF-STEM (high-angle annular dark-field scanning transmission electron microscope) observation has been performed for unisize tungsten oxide clusters fixed on a carbon substrate. The exact position of each tungsten atom in the clusters has been determined successfully by analyzing the HAADF-STEM images, so that it appears that the clusters have a three-dimensional tungsten-oxide bonding network. Furthermore, the tungsten clusters are not dissociated in all the processes of the cluster preparation on the substrate by the soft-landing of size-selected tungsten cluster ions, the exposure to air, and the substrate pretreatment for the HAADF-STEM observation. However, the clusters are decomposed gradually during the HAADF-STEM observation due to the irradiation of the high-energy electron beam.

    Original languageEnglish
    Pages (from-to)1706-1711
    Number of pages6
    JournalJournal of Physical Chemistry C
    Volume118
    Issue number3
    DOIs
    Publication statusPublished - 2014 Jan 23

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Energy(all)
    • Physical and Theoretical Chemistry
    • Surfaces, Coatings and Films

    Fingerprint Dive into the research topics of 'Determination of exact positions of individual tungsten atoms in unisize tungsten oxide clusters supported on carbon substrate by HAADF-STEM observation'. Together they form a unique fingerprint.

    Cite this