Observation of liquid crystals confined in an elliptic cylinder

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We present the observation of liquid crystals confined in elliptic cylinders. To fabricate the elliptic cylinder, poly(dimethlysiloxane) micro-channels having circular cross sections are stretched uniaxially along the direction of the diameter. Upon increasing the aspect ratio of the elliptic cross section, confined nematic liquid crystals maintain their escaped-radial configuration with homeotropic anchoring. In smectic-A liquid crystals, defect regions of focal conic domains appear as a function of the aspect ratio. We propose a model to understand the formation of these defects in terms of the confinement-induced misorientation, and resultant tilt grain boundaries. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4745773]
Publisher
AMER INST PHYSICS
Issue Date
2012-08
Language
English
Article Type
Article
Keywords

CYLINDRICAL CAVITIES; DISCLINATIONS; BIREFRINGENCE; NEMATICS; SMECTICS

Citation

APPLIED PHYSICS LETTERS, v.101, no.6

ISSN
0003-6951
DOI
10.1063/1.4745773
URI
http://hdl.handle.net/10203/102949
Appears in Collection
PH-Journal Papers(저널논문)
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