Internal structure analysis of monodispersed pseudocubic hematite particles by electron microscopy

Gyeong Su Park, Daisuke Shindo, Yoshio Waseda, Tadao Sugimoto

    研究成果: Article査読

    84 被引用数 (Scopus)

    抄録

    Morphology and internal structure of monodispersed pseudocubic hematite (α-Fe2O3) particles produced by the gel-sol method were investigated in detail through high-resolution electron microscopy on their thin sections prepared with an ultramicrotome. It was confirmed that the c-axis of a particle corresponded to the longest diagonal axis of the particle. High-resolution electron micrographs of thin sections directly revealed the polycrystallinity of the particles and clearly showed the arrangement of the subcrystals and their crystallographic orientations. The subcrystals near the surface of a particle were of a rectangular shape bound by the {011̄2} planes, and their width was about 12-16 nm with small variation of the length depending on the position in a particle. The subcrystals were radially developed from the center of a particle in all directions, but most preferentially in the longest diagonal axis of a particle. Besides, it was found from EDX analysis that the adsorbed Cl- ions as a shape controller were incorporated into the pseudocubic hematite particles during their growth.

    本文言語English
    ページ(範囲)198-207
    ページ数10
    ジャーナルJournal of Colloid And Interface Science
    177
    1
    DOI
    出版ステータスPublished - 1996 1月 15

    ASJC Scopus subject areas

    • 電子材料、光学材料、および磁性材料
    • 生体材料
    • 表面、皮膜および薄膜
    • コロイド化学および表面化学

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