pH-responsive cholesteric liquid crystal double emulsion droplets prepared by microfluidics
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- 作者：Ju-Hyun JangAuthor Vitae ; Soo-Young Park ; psy@knu.ac.krAuthor Vitae
- 关键词：Cholesteric liquid crystal ; Double emulsion droplet ; Microfluidics ; pH-responsive ; Polyelectrolyte
- 刊名：Sensors and Actuators B: Chemical
- 出版年：2017
- 出版时间：31 March 2017
- 年：2017
- 卷：241
- 期：Complete
- 页码：636-643
- 全文大小：2322 K
- 卷排序：241
文摘
Uniformly sized cholesteric liquid crystal (CLC) double emulsion droplets were synthesized from MLC-2132 doped with CB15 using a microfluidic method. CLC double emulsion droplets were further functionalized with PAA-b-LCP to make them pH-responsive. The helical structure and the reflecting color patterns of the CLC droplets changed because of pH-dependent protonation and deprotonation of the carboxylic group of PAA, which causes the planar and homeotropic orientations, respectively. This pH-sensitive mono-dispersed CLC DEDs have potential to be used as a biosensor by immobilizing ligands causing local pH changes by analytes.