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Template-directed inorganic crystallization: oriented nucleation of barium sulfate under Langmuir monolayers of an aliphatic long chain phosphonate

journal contribution
posted on 2023-05-18, 14:17 authored by Heywood, BR, Mann, Stephen
Compressed Langmuir monolayers of an aliphatic long chain (C20) phosphonate were shown to influence the morphology and crystallographic orientation of barium sulfate nucleated from the aqueous subphase. The crystals were aligned with the [100] crystallographic axis perpendicular to the plane of the monolayer indicating that nucleation occurred on the (100) face. The majority of these oriented crystals exhibited a rhombic habit during the initial stages of crystallization. These subsequently developed into platelike or 'bow-tie' morphologies depending upon the growth mechanism under the monomolecular film. Occasionally, small polar laths oriented along the [100] axis were observed. For each of these crystal forms, nucleation on the (100) face and their subsequent development can be rationalized in terms of specific electrostatic, geometric and stereochemical interactions at the organic/inorganic interface.

History

Publication title

Langmuir

Volume

8

Issue

5

Pagination

1492-1498

ISSN

0743-7463

Publisher

Amer Chemical Soc

Place of publication

1155 16th St, NW, Washington, USA, DC, 20036

Rights statement

Copyright 1992 American Chemical Society

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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