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The True Liquid Crystal Approach to Mesoporous Silica

Published online by Cambridge University Press:  10 February 2011

George S. Attard ,
Mark Edgar ,
James W. Emsley  and
Christine G. Göltner
George S. Attard
Affiliation:
Department of Chemistry, University of Southampton, SO 17 1BJ, United Kingdom
Mark Edgar
Affiliation:
Institut für Organische Chemie, Freie Universität Berlin, Takustr.3, 14195 Berlin, Germany
James W. Emsley
Affiliation:
Department of Chemistry, University of Southampton, SO 17 1BJ, United Kingdom
Christine G. Göltner
Affiliation:
Max-Planck-Institute for Colloids and Interfaces, Kantstr. 55, 14513 Teltow/Seehof, Germany
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Abstract

Liquid crystalline phases, consisting of nonionic surfactant and water, are exploited as templates for the synthesis of inorganic nanostructures In this approach the aqueous domains of a lyotropic liquid crystal phase function as a confining medium, in which the polymerisation of a watersoluble precursor takes place without destroying the nanostructure. Conducting the prepration of mesoporous silica in a lyotropic liquid crystal phase has considerable advantages over previous routes towards mesoporous ceramic oxides. (i) The nanostructure of the solid can be predicted a priori by knowing the phase structure of the liquid crystal before solidification, (ii) this approach allows the use of nonionic surfactants as templates, (iii) the progress of the reaction can be observed by a variety of methods, such as polarised light optical microscopy, X-ray diffraction, and deuterium NMR spectroscopy, all of which are noninvasive. The synthesis and a new way of monitoring the temporal evolution of the inorganic nanostructure using deuterium NMR spectroscopy are described. The results show unambiguously that the lyotropic liquid crystal phase acts as a template for the nanostructure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 425: Symposium I – Liquid Crystals for Advanced Technologies , 1996 , 179
Copyright
Copyright © Materials Research Society 1996

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