文献类型：期刊文献

英文题名：Quadri-Dimensional Anti-counterfeiting Flexible Label Programmed by a Photoresponsive Liquid Crystal Polymer Film

作者：Liang, Xinshi[1,2];Hu, Honglong[1,2];Zheng, Zhi-gang[3];He, Min[4];Li, Mengqi[1,2];Lv, Ning[1,2];Shen, Ning[4];Zhu, Wei-Hong[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Joint Int Res Lab Precis Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr,Shangh, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Joint Int Res Lab Precis Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr,Shangh, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2023

卷号：62

期号：26

起止页码：9961

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20232814390061);WOS:【SCI-EXPANDED(收录号:WOS:001016698100001)】；

基金：This work was supported by the National Key Research and Development Program of China (SQ2022YFA1200117), NSFC (21788102, 62035008, 61822504, 22108076, and 62275081), the Scientific Committee of Shanghai (21JC1401700, 15XD1501400, and 2021-01-07-00-02-E00107), the China Postdoctoral Science Foundation (2022M721143), and the Shanghai Sailing Program (20YF1410500 and 23YF1409000).

语种：英文

外文关键词：Fluorescence - Liquid crystal polymers - Microstructure - Photochromism - Semiconducting films

摘要：Creatingflexible materials with multi-dimensional security holdsgreat promise for anti-counterfeiting labels in food, currency, andpharmaceuticals, but it is proven extremely challenging. Herein, wepropose a photoresponsive liquid crystal polymer (LCP) film by incorporatingpolymerizable photoswitch into commercial LCP with ultraviolet (UV)light exposure. Reversible photochromism can be observed between light-and dark-red under UV and visible light irradiation alternatively,accompanying by variation of fluorescence intensity. In addition,a series of photonic microstructures are written on the flexible LCPfilm by taking advantage of the predefined patterned light. A quadri-dimensionalanti-counterfeiting flexible label, featuring photochromism, fluorescence,embedded microstructures, and optical diffraction is constructed withthe assistance of photoresponsive LCP film. This strategy representsa beneficial step toward flexible anti-counterfeiting materials, whichenhances the secure level for practical product engineering applications.