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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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Layering transitions and metastable structures of cholesteric liquid crystals in cylindrical confinement

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Title
Layering transitions and metastable structures of cholesteric liquid crystals in cylindrical confinement
Author
Eun, JongheePollard, JosephKim, Sung-JoMachon, ThomasJeong, Joonwoo
Issue Date
2021-08
Publisher
National Academy of Sciences
Citation
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, v.118, no.33, pp.e2102926118
Abstract
Our study of cholesteric lyotropic chromonic liquid crystals in cylindrical confinement reveals the topological aspects of cholesteric liquid crystals. The double-twist configurations we observe exhibit discontinuous layering transitions, domain formation, metastability, and chiral point defects as the concentration of chiral dopant is varied. We demonstrate that these distinct layer states can be distinguished by chiral topological invariants. We show that changes in the layer structure give rise to a chiral soliton similar to a toron, comprising a metastable pair of chiral point defects. Through the applicability of the invariants we describe to general systems, our work has broad relevance to the study of chiral materials.
URI
https://scholarworks.unist.ac.kr/handle/201301/53412
URL
https://www.pnas.org/content/118/33/e2102926118
DOI
10.1073/pnas.2102926118
ISSN
0027-8424
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PHY_Journal Papers
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