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첨단연성물질 연구단
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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(s)
Joonwoo Jeong; Gross A.; Wei W.-S.; Tu F.; Lee D.; Collings P.J.; Yodh A.G.
Publication Date
2015-06
Journal
SOFT MATTER, v.11, no.34, pp.6747 - 6754
Publisher
ROYAL SOC CHEMISTRY
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. © The Royal Society of Chemistry 2015
URI
https://pr.ibs.re.kr/handle/8788114/2158
ISSN
1744-683X
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > Journal Papers (저널논문)
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