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Selective crystallization of BaF under a compressed Langmuir monolayer of behenic acid

Chemistry of Materials, ISSN: 0897-4756, Vol: 13, Issue: 2, Page: 325-328
2001
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Metrics Details

  • Citations
    18
    • Citation Indexes
      18
  • Captures
    2

Article Description

Selective crystallization of BaF crystals under a compressed Langmuir monolayer of behenic acid [CH(CH)COOH] has been studied by using X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and energy-dispersive X-ray analysis. It was found that, in the absence of a monolayer, three kinds of crystals (BaClF, BaC1F, and BaF) can be obtained by mixing BaCl with a NHF solution. However, in the presence of the monolayer of behenic acid, only BaF crystals appear at the monolayer - subphase interface and crystals have a special crystal face (100). During this process of crystallization, the monolayer plays a very important role and acts as a template that can preferentially select a special crystal and a special crystal face. The above results can be explained in terms of a specific molecular interaction between ions and the headgroups of the monolayer and specific electrostatic, geometric, and stereochemical interactions at the organic - inorganic interface.

Bibliographic Details

Lehui Lu; Haining Cui; Wei Li; Hongjie Zhang; Shiquan Xi

American Chemical Society (ACS)

Chemistry; Chemical Engineering; Materials Science

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