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8 February 2018 Chirality transfer technique between liquid crystal microdroplets using microfluidic systems
Jin-kun Guo, Doyeon Lee, Jang-kun Song
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Proceedings Volume 10555, Emerging Liquid Crystal Technologies XIII; 105551H (2018) https://doi.org/10.1117/12.2309607
Event: SPIE OPTO, 2018, San Francisco, California, United States
Abstract
Cholesteric liquid crystal (LC) microdroplet is applied in many areas, such as tunable laser, biosensor, information display and security identification, due to its unique optical properties. The topological structure, defects, and photonic crystallinity in the cholesteric liquid crystal (LC) microdroplet can be controlled through the chirality. Here we report an interesting phenomenon that chirality information can be shared among dispersed LC microdroplets in surfactant aqueous solution, which is driven by the transferring of chiral dopant molecules. As a result, we developed an artificial molecule transfer technology which could in situ vary the material composition within the isolated dispersed microdroplets. The molecular transfer is switchable and the transfer speed is controllable by tuning the molecular solubility in continuous phase. Based on this technique, we manipulated, forward and backward, the topological evolution and the photonic crystal band-gap of the dispersed LC droplet. This technique is an easy and powerful experimental tool, and it may be applicable to other fields in optical application, biology, chemistry and material science.
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Jin-kun Guo, Doyeon Lee, and Jang-kun Song "Chirality transfer technique between liquid crystal microdroplets using microfluidic systems", Proc. SPIE 10555, Emerging Liquid Crystal Technologies XIII, 105551H (8 February 2018); https://doi.org/10.1117/12.2309607
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KEYWORDS
Liquid crystals
Molecules
Microfluidics
Photonic crystals
Biology
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