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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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Confinement-Induced Transition of Topological Defects in Smectic Liquid Crystals: From a Point to a Line and Pearls

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Title
Confinement-Induced Transition of Topological Defects in Smectic Liquid Crystals: From a Point to a Line and Pearls
Author
Jeong, JoonwooKim, Mahn Won
Keywords
FOCAL CONIC DOMAINS; PHASES; INSTABILITY; CURVATURE
Issue Date
2012-05
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v.108, no.20, pp.1 - 5
Abstract
We report a study on the confinement-induced transition of the topological defects of liquid crystals (LCs) using smectic-A LCs confined in prolate spheroids with homeotropic anchoring. Upon increasing the aspect ratio of a LC droplet, dispersed in a stretched elastomer film, the topological defect undergoes a transition from a point to a line of which the length is a function of the aspect ratio. Additionally, when the size of a droplet is larger than a certain value, the defect has a pearl-necklace-like texture. We propose a simple model to understand the formation of these defects in terms of the misorientation and undulation instability of the smectic layers
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DOI
10.1103/PhysRevLett.108.207802
ISSN
0031-9007
Appears in Collections:
PHY_Journal Papers
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