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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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Liquid crystal Janus emulsion droplets: preparation, tumbling, and swimming

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Title
Liquid crystal Janus emulsion droplets: preparation, tumbling, and swimming
Author
Jeong, JoonwooGross, AdamWei, Wei-ShaoTu, FuquanLee, DaeyeonCollings, Peter JYodh, Arjun G
Issue Date
2015-09
Publisher
ROYAL SOC CHEMISTRY
Citation
SOFT MATTER, v.11, no.34, pp.6747 - 6754
Abstract
This study introduces liquid crystal (LC) Janus droplets. We describe a process for the preparation of these droplets, which consist of nematic LC and polymer compartments. The process employs solvent-induced phase separation in emulsion droplets generated by microfluidics. The droplet morphology was systematically investigated and demonstrated to be sensitive to the surfactant concentration in the background phase, the compartment volume ratio, and the possible coalescence of multiple Janus droplets. Interestingly, the combination of a polymer and an anisotropic LC introduces new functionalities into Janus droplets, and these properties lead to unusual dynamical behaviors. The different densities and solubilities of the two compartments produce gravity-induced alignment, tumbling, and directional self-propelled motion of Janus droplets. LC Janus droplets with remarkable optical properties and dynamical behaviors thus offer new avenues for applications of Janus colloids and active soft matter.
URI
https://scholarworks.unist.ac.kr/handle/201301/19105
URL
http://pubs.rsc.org/en/Content/ArticleLanding/2015/SM/C5SM01053E#!divAbstract
DOI
10.1039/c5sm01053e
ISSN
1744-683X
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