Aqueous foams as templates for the synthesis of calcite crystal assemblies of spherical morphology

Rautaray, Debabrata ; Sinha, Kaustav ; Shiv Shankar, S. ; Adyanthaya, Suguna D. ; Sastry, Murali (2004) Aqueous foams as templates for the synthesis of calcite crystal assemblies of spherical morphology Chemistry of Materials, 16 (7). pp. 1356-1361. ISSN 0897-4756

Full text not available from this repository.

Official URL: http://pubs.acs.org/doi/abs/10.1021/cm035182l

Related URL: http://dx.doi.org/10.1021/cm035182l

Abstract

The crystallization of calcite in the form of spheroaggregates in aqueous foam stabilized by the surfactant sodium bis-2-ethylhexyl-sulfosuccinate (aerosol OT, AOT) by a method of ion entrapment is described. Reaction of Na2CO3 with Ca2+ ions electrostatically entrapped in the foam results in the formation of flat, platelike calcite crystals, possibly in the plateau border regions of the foam. Hydrodynamic flow patterns in the foam are believed to transport the calcite platelets from the plateau border regions into the larger plateau junctions where they assemble into spherical structures by hydrophobic association. The large interfacial area of the liquid lamellae in the foam provides an attractive and versatile template for the large-scale synthesis of not only minerals but also other nanoscale materials.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
ID Code:47050
Deposited On:06 Jul 2011 14:18
Last Modified:06 Jul 2011 14:18

Repository Staff Only: item control page