Journal
SMALL
Volume 15, Issue 49, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201903818
Keywords
emulsions; liquid crystal; self-regulation; switchable lasing
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Funding
- National Research Foundation of Korea (NRF) - Korean government (MSIT) [2017M3C1A3013923, 2017R1E1A1A01072798]
- French National Research Agency (ANR) [13-JS08-0006-01]
- Korea Institute of Science and Technology [2E29300]
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A structurally reversible smectic liquid crystal (LC) emulsion made of semifluorinated rod-type molecules in silicon oil, which is controlled by simple heating and cooling, is presented. Without adding any kind of additives, such as surfactants, polymers or emulsifiers, and without using any special tools, such as microfluidics or gas bubbling, the LC molecules spontaneously form monodisperse spherical and myelin-like structures upon cooling from the isotropic temperature. The LC emulsion can easily trap guest materials, providing a platform for repeatable and reliable switchable emulsification. For example, this interesting system enables the realization of an on-off lasing system by confining fluorescent dyes in the LC droplets.
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