Yoshiko Takenaka, Miha Skarabot, Igor Musevic
We report a necklace structure made of liquid crystal dispersed in polyvinyl alcohol (PVA) aqueous solution, which is fabricated by a microfluidics device. In the necklace structure, liquid crystal droplets of tens of micrometer diameter are connected by micro-tethers, which are birefringent, are not penetrating the droplets, and can be elastically stretched by applying external force. The necklace structure was analyzed by fluorescent confocal microscopy, and the tethers are made of liquid crystal and PVA composite. The elastic constant of the tether was determined by using laser tweezers to stretch the tether. The Whispering Gallery Modes (WGM) circulating inside individual droplets in the necklace structure were also observed.
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