Volume 69, Number 2, January 2005
|Page(s)||221 - 227|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||15 December 2004|
Adsorption-induced anchoring transition in cylindrically confined liquid-crystal hydrophobic aerosil dispersions
Department of Physics, Kent State University - Kent, OH 44242, USA
Accepted: 5 November 2004
An adsorption-induced anchoring transition was found by confining liquid-crystal hydrophobic aerosil dispersions to cylindrical pores. The aerosil effects on the director configurations and on the orientational-order wetting at the pore walls were determined by DNMR. The aerosil spheres are adsorbed at the pore wall, hindering the planar anchoring and inducing an axial-to-radial structural transition dependent on increasing aerosil density. The orientational-order surface wetting in the isotropic phase is modified by the aerosil-introduced disorder from quasi-complete to partial to non-wetting.
PACS: 61.30.Pq – Microconfined liquid crystals: droplets, cylinders, randomly confined liquid crystals, polymer dispersed liquid crystals, and porous systems / 64.70.Md – Transitions in liquid crystals / 68.08.Bc – Wetting
© EDP Sciences, 2005
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