Dynamic coloration of polymerized cholesteric liquid crystal networks by infiltrating organic compounds

作     者：Yu Cao Li Chong Ke-Hui Wu Lu-Qian You Sen-Sen Li Lu-Jian Chen 曹宇;种立;吴科辉;游露倩;李森森;陈鹭剑

作者机构：Department of Electronic EngineeringSchool of Electronic Science and EngineeringXiamen UniversityXiamen 361005China 

出 版 物：《Chinese Optics Letters》 (中国光学快报（英文版）)

年 卷 期：2022年第20卷第9期

页      面：43-48页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 070303[理学-有机化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Nos.62075186 and 62175206) the National Key R&D Program of China(No.2019YFA0905800) 

主　　题：cholesteric liquid crystal structural color microfluidics diffusion volatile organic compounds 

摘      要：We demonstrate the dynamic coloration of polymerized cholesteric liquid crystal(PCLC)networks templated by the“wash-out/refillmethod in the presence of organic *** reflection colors were modulated by two key approaches,that is,the injection of mutually soluble organic fluids into a microfluidic channel and the diffusion of volatile organic compounds(VOCs).The reversible tuning of reflected colors with central wavelengths between~450 nm and~600 nm was achieved by alternative injection of nematic liquid crystal E7(n_(av)=1.64)and benzyl alcohol(n=1.54)using syringe *** fascinating iridescence with reflection centers from~620 nm to~410 nm was presented from the volatilization and diffusion of alcohol as a model ***,the flow velocity of fluid and the diffusion time were adjusted to explore the underlying mechanism for the dynamic coloration of cholesteric *** work is expected to extend the study of PCLCs as a dynamically tunable optofluidic reflector,visually readable sensor,or compact anticounterfeit label in response to organic compounds.