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Jeong, Joonwoo
Experimental Soft Matter Physics Lab (SOPHY)
Research Interests
  • Liquid crystals, polymers, colloids, emulsions, pattern formation, microfluidics, microfabrication, optical microscopy

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Observation of liquid crystals confined in an elliptic cylinder

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Title
Observation of liquid crystals confined in an elliptic cylinder
Author
Jeong, JoonwooKim, Mahn Won
Keywords
CYLINDRICAL CAVITIES; DISCLINATIONS; BIREFRINGENCE; NEMATICS; SMECTICS
Issue Date
2012-08
Publisher
AMER INST PHYSICS
Citation
APPLIED PHYSICS LETTERS, v.101, no.6, pp.061914 -
Abstract
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.
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DOI
10.1063/1.4745773
ISSN
0003-6951
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PHY_Journal Papers
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