文献类型：期刊文献

英文题名：Paintable cholesteric liquid crystals with synergistic photothermal modulation

作者：Li, Bowen[1];Lin, Han[1];Li, Jiale[1];Jing, Jiaqi[1];Wan, Wentan[1];Yuan, Conglong[1];Hu, Honglong[1];Zheng, Zhigang[1]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China

年份：2026

卷号：41

期号：5

起止页码：605

外文期刊名：CHINESE JOURNAL OF LIQUID CRYSTALS AND DISPLAYS

收录：WOS:【ESCI(收录号:WOS:001825378800001)】；

基金：Supported by National Key Research and Development Program of China (No.2022YFA1203700) ; National Natural Science Foundation of China (No.22305079, No.62505085)

语种：英文

外文关键词：cholesteric liquid crystals; photothermal synergistic regulation; paintable ink; structural color; flexible optical applications

摘要：Flexibly tunable liquid crystal optical elements exhibit broad application in smart displays, soft robotics, and information encryption. Cholesteric liquid crystals(CLCs), endowed with Bragg reflection characteristics and excellent external field responsiveness by their chiral helical structures, are becoming strong competitors in this field. However, conventional CLCs usually rely on single external field regulation with limited tunability, and their high fluidity poses challenges for effective encapsulation and stable application on flexible substrates. To address these issues, this paper designs a thermosensitive liquid crystal system incorporated with photoswitch, while introducing a paintable ink composed of ethyl cellulose and terpineol to optimize viscosity, thereby achieving synergistic regulation via dual external fields of temperature and light. Experimental results show that the thermosensitive system enables broadband regulation of the reflection wavelength from 420 nm to 1 000 nm within the temperature range of 37 degrees C to 29 degrees C . Upon incorporation of photoswitch, dynamic tuning of the reflection wavelength from 450 nm to 700 nm is achieved by light irradiation at a specific temperature, where temperature and light synergistically determine the pitch variation. Systematic optimization of the mass ratio between CLC and the ink reveals that the 9 & ratio;1 ratio strikes the best balance between brushability and film-forming integrity. This study successfully demonstrates photothermal synergistic dynamic regulation of the Bragg reflection wavelength of CLCs on flexible substrates, enabling on-demand customization of specific reflection colors, thereby providing a novel photonic platform with multi-external-field responsiveness and facile flexible encapsulation for information anti-counterfeiting and smart display applications.