Columnar liquid crystals of gibbsite platelets as templates for the generation of ordered silica structures
Publication date
2008
Authors
Mourad, Maurice
Groeneveld, Esther
de Lange, P.J.
Vonk, Ch.
van der Beek, D.
Lekkerkerker, H. N.W.
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Abstract
In this paper we describe the use of columnar liquid crystals of silica coated colloidal gibbsite platelets as templates for the generation of ordered silica structures. The colloidal liquid crystal phases can be formed in a few hours by modest centrifugation forces (100–200g). Base catalysed hydrolysis of tetraethoxysilane (TEOS) is used to deposit silica in the space between the silica coated gibbsite particles. The size of the gibbsite platelets is varied between 200 and 500 nm and the thickness of the silica coating between 5 and 15 nm making the system a very versatile templating material. Acid leaching is used to selectively remove the gibbsite material.
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Mourad, M C D, Groeneveld, E, de Lange, P J, Vonk, C, van der Beek, D & Lekkerkerker, H N W 2008, 'Columnar liquid crystals of gibbsite platelets as templates for the generation of ordered silica structures', Journal of Materials Chemistry, vol. 18, no. 25, pp. 3004-3010.