Electron Microscopy Study of Delamination in Dispersions of the Perovskite-Related Layered Phases K[Ca2Nan−3NbnO3n+1]: Evidence for Single-Layer Formation

M. M.J. Treacy, S. B. Rice, A. J. Jacobson, J. T. Lewandowski

Research output: Contribution to journalArticle

198 Scopus citations

Abstract

Intercalation of basic surfactant molecules into the layered perovskites H[Ca2Nan−3NbnO3n+1], n = 3–5, can be used to cause spontaneous exfoliation of the structure into thin sheets that form stable dispersions in a polar solvent. The extent of exfoliation has been determined by examining Rutherford scattered intensities into a high-angle annular dark-field detector in a scanning transmission electron microscope. It is shown that for n ≤ 5, the layered perovskites can be exfoliated to form single layers. Exfoliation is easiest for the n = 3 and 4 materials.

Original languageEnglish (US)
Pages (from-to)279-286
Number of pages8
JournalChemistry of Materials
Volume2
Issue number3
DOIs
StatePublished - May 1 1990
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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