Mesogens' orientation at cylindrical and spherical surfaces during transition from isotropic phase to nematic liquid crystal phase

Structure of an oriented layer of mesogens on the interface at the isotropic phase (IP) - nematic liquid crystal (NLC) transition has been studied by polarization microscopy method. The thickness of the oriented layer was found to be equal to 50 ÷1000 µm, it decreases with a reduction of the surface...

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Bibliographic Details
Published in:Molecular Crystals and Liquid Crystals 2017-03, Vol.646 (1), p.242-249
Main Authors: Vasilchikova, E. N., Barabanova, N. N., Bogdanov, D. L., Belyaev, V. V., Bugrimov, A. L., Dadivanyan, A. K.
Format: Article
Language:English
Subjects:
birefringence
Crystal structure
Crystals
Curvature
Liquid crystal
Liquid crystals
Mathematical analysis
Microscopy
Nematic crystals
order parameter
Order parameters
oriented layer
Phase transitions
polarization microscopy
Polarized light
Solid phases
Thickness
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Summary:Structure of an oriented layer of mesogens on the interface at the isotropic phase (IP) - nematic liquid crystal (NLC) transition has been studied by polarization microscopy method. The thickness of the oriented layer was found to be equal to 50 ÷1000 µm, it decreases with a reduction of the surface curvature radius. Analytical expressions for the phase delay difference arising at passing of plane-polarized light through the mesogen layer oriented towards cylindrical and spherical surfaces have been obtained. The order parameter in mesogens at the IP-NLC transition was determined.
ISSN:1542-1406
1563-5287
1527-1943
DOI:10.1080/15421406.2017.1288027