High-voltage, high-resolution electron microscopy on thin sections of monodispersed pseudocubic hematite particles

Gyeong Su Park, Daisuke Shindo, Yoshio Waseda

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10 Citations (Scopus)

Abstract

An ultramicrotome was applied to prepare thin sections of monodispersed pseudocubic hematite (α-Fe2O3) particles produced by the gel-sol method for studying their external shapes and internal structures coupled with high-voltage, high-resolution electron microscopy (HREM). An ultramicrotome enables us to provide a series of thin sections of the particles when using appropriate acril resin and choosing optimum slicing conditions. A series of thin sections shows the details of external shape of a particle. High-voltage, HREM images of these thin sections clearly reveal the arrangements of subcrystals and their crystallographic orientations. Moreover, despite the background contrast due to the carbon film of the microgrid, the positions of Fe atoms near the surface of particles are directly identified by high-voltage, HREM. The preparation of thin sections with an ultramicrotome and their observation by high-voltage HREM are found very useful for making clear the internal structure of fine oxide particles in the atomic scale.

Original languageEnglish
Pages (from-to)208-212
Number of pages5
JournalJournal of Electron Microscopy
Volume43
Issue number4
Publication statusPublished - 1994 Aug

Keywords

  • HREM
  • High-voltage electron microscope
  • Monodispersed particle
  • Subcrystal
  • Ultramicrotome

ASJC Scopus subject areas

  • Instrumentation

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