High-voltage high-resolution electron microscopy on thin films of monodispersed pseudocubic and peanut-type hematite particles

Daisuke Shindo, Saburo Aita, Gyeong Su Park, Tadao Sugimoto

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    In order to investigate internal structures of monodispersed hematite (α-Fe2O3) particles of pseudocubic and peanut-type shapes prepared by the gel-sol method, their thin sections were prepared by an ultra-microtome and studied by transmission electron microscopy. The surfaces and arrangements of the individual small subcrystals as components of the monodispersed particles were clearly observed on the atomic scale by high-voltage high-resolution electron microscopy. This is direct evidence of the polycrystallinity of these particles. Furthermore, it was found that the subcrystals of the pseudocubic particles had a square shape bounded by sharp {011̄2} surfaces lining up with the same orientation, whereas those of the peanut-type particles had relatively round surfaces and the crystallographic orientations of adjacent subcrystals slightly differed from each other.

    Original languageEnglish
    Pages (from-to)1226-1228
    Number of pages3
    JournalMaterials Transactions, JIM
    Volume34
    Issue number12
    DOIs
    Publication statusPublished - 1993

    ASJC Scopus subject areas

    • Engineering(all)

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