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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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Effects of poly(ethylene glycol) on the wetting behavior and director configuration of lyotropic chromonic liquid crystals confined in cylinders

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Title
Effects of poly(ethylene glycol) on the wetting behavior and director configuration of lyotropic chromonic liquid crystals confined in cylinders
Author
Lee, HyesongSunkara, VijayaCho, Yoon-KyoungJeong, Joonwoo
Issue Date
2019-08
Publisher
ROYAL SOC CHEMISTRY
Citation
SOFT MATTER, v.15, no.30, pp.6127 - 6133
Abstract
We investigate the effects of poly(ethylene glycol) (PEG) doping on nematic lyotropic chromonic liquid crystals (LCLCs) confined in a cylindrical cavity. First, PEG added to Sunset Yellow (SSY) renders confining glass surfaces nemato-phobic by adsorption. We also confirm that the grafting of PEG to bare glass surfaces changes them from nemato-philic to nemato-phobic. This change in the wetting behavior affects how nematic director configurations form and relax. Additionally, we observe that PEG-doped nematic SSY retains the double-twist director configuration as in the PEG-free case. However, the PEG-doped nematic SSY is accompanied by unprecedented domain-wall-like defects and heterogeneity in the director configuration. We propose multiple hypotheses on how PEG changes the director configuration, including the formation of meta-stable director configurations.
URI
https://scholarworks.unist.ac.kr/handle/201301/27198
URL
https://pubs.rsc.org/en/content/articlelanding/2019/SM/C9SM00927B#!divAbstract
DOI
10.1039/c9sm00927b
ISSN
1744-683X
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PHY_Journal Papers
BME_Journal Papers
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