A review of fine structures of nanoporous materials as evidenced by microscopic methods

Zheng Liu, Nobuhisa Fujita, Keiichi Miyasaka, Lu Han, Sam M. Stevens, Mitsuo Suga, Shunsuke Asahina, Ben Slater, Changhong Xiao, Yasuhiro Sakamoto, Michael W. Anderson, Ryong Ryoo, Osamu Terasaki

Research output: Contribution to journalReview articlepeer-review

36 Citations (Scopus)

Abstract

This paper reviews diverse capabilities offered by modern electron microscopy techniques in studying fine structures of nanoporous crystals such as zeolites, silica mesoporous crystals, metal organic frameworks and yolk-shell materials. For the case of silica mesoporous crystals, new approaches that have been developed recently to determine the three-dimensionally periodic average structure, e.g., through self-consistent analysis of electron microscope images or through consideration of accidental extinctions, are presented. Various structural deviations in nanoporous materials from their average structures including intergrowth, surface termination, incommensurate modulation, quasicrystal and defects are demonstrated. Ibidem observations of the scanning electron microscope and atomic force microscope give information about the zeolite-crystal-growth mechanism, and an energy for unstitching a building-unit from a crystal surface is directly observed by an anatomic force microscope. It is argued how these observations lead to a deeper understanding of the materials.

Original languageEnglish
Pages (from-to)109-146
Number of pages38
JournalJournal of Electron Microscopy
Volume62
Issue number1
DOIs
Publication statusPublished - 2013 Feb 1

Keywords

  • AFM
  • Electron microscopy
  • MOF
  • Silica mesoporous crystal
  • Structure modulation
  • Zeolite

ASJC Scopus subject areas

  • Instrumentation

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