文献类型：期刊文献

英文题名：Hyper-stable field-stimulated soft cholesteric heliconical architectures

作者：Yuan, Cong-long[1];Chen, Jia-jun[1];Liu, Bing-hui[1];Sun, Pei-zhi[1];Hu, Hong-long[2];Tang, Yuqi[3,4];Wang, Yi-fei[1];Zhan, Yuxing[1];Li, Mengqi[2];Zheng, Zhi-gang[1,5];Li, Quan[3,4,6]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Southeast Univ, Inst Adv Mat, Nanjing 211189, Peoples R China;[4]Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Peoples R China;[5]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[6]Kent State Univ, Mat Sci Grad Program, Kent, OH 44242 USA

年份：2023

卷号：6

期号：10

起止页码：3555

外文期刊名：MATTER

收录：;EI(收录号：20233914801885);WOS:【SCI-EXPANDED(收录号:WOS:001148387200001)】；

基金：We thank Satoshi Aya for fruitful discussions. The authors acknowledge the support from the National Key Research and Development Program of China (2022YFA1203700 and 2022YFA1405000) ; the National Science Foundation of China (grant nos. 62275081, 62035008, and 61822504) ; the Innovation Program of Shanghai Municipal Education Commission; the Scientific Committee of Shanghai (2021-01-07-00-02-E00107) ; the "Shu guang Program"of the Shanghai Education Development Foundation; the Shanghai Municipal Education Commission (21SG29) ; the Jiangsu Innovation Team Program; and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Dimers - Energy gap - Liquid crystals - Photonic band gap

摘要：Cholesteric heliconical (CH) superstructures are capable of manipulating the photonic band gap over an ultra-wide spectral range, making them desirable for field-stimulated soft photonic materials. However, their practical applications are severely limited by the inevitable crystallization of the liquid-crystal (LC)-dimer-based compositions, which typically occurs within a few hours. Herein, we developed a hyper-stable CH superstructure that remains crystallization free and maintains robust physical parameters and electrical-field-modulating properties even after 1 year of storage. This stability is achieved through the intricate molecular interactions of multiple bent-shaped LC dimers with varying molecular central flexibility, which significantly enhances the supercooling capacity and prevents crystallization. Furthermore, a CH superstructure based on a multifunctional anti-counterfeiting technique was established. This work represents a breakthrough in achieving prominent stability in CH superstructures and other LC-dimer-based material systems, thereby addressing the long-standing insurmountable challenge and inspiring further exploration in soft-matter and photonics applications.