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Dynamic coloration of polymerized cholesteric liquid crystal networks by infiltrating organic compounds 被引量:1

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摘要 We demonstrate the dynamic coloration of polymerized cholesteric liquid crystal(PCLC)networks templated by the“wash-out/refill”method in the presence of organic compounds.The 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 pumps.The fascinating iridescence with reflection centers from~620 nm to~410 nm was presented from the volatilization and diffusion of alcohol as a model VOC.Additionally,the flow velocity of fluid and the diffusion time were adjusted to explore the underlying mechanism for the dynamic coloration of cholesteric networks.This 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.
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(Department of Electronic Engineering,School of Electronic Science and Engineering,Xiamen University,Xiamen 361005,China)
出处 《Chinese Optics Letters》 SCIE EI CAS CSCD 2022年第9期43-48,共6页 中国光学快报(英文版)
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)。
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