文献类型：期刊文献

英文题名：Digital photoprogramming of liquid-crystal superstructures featuring intrinsic chiral photoswitches

作者：Zheng, Zhigang[1,2,3];Hu, Honglong[1,2];Zhang, Zhipeng[1,2];Liu, Binghui[3];Li, Mengqi[1,2];Qu, Da-Hui[1,2];Tian, He[1,2];Zhu, Wei-Hong[1,2];Feringa, Ben L.[1,2,4,5]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem,Inst F, Sch Chem & Mol Engn,Joint Int Res Lab Precis Chem, Shanghai, Peoples R China;[3]East China Univ Sci & Technol, Sch Phys, Shanghai, Peoples R China;[4]Univ Groningen, Ctr Syst Chem, Stratingh Inst Chem, Groningen, Netherlands;[5]Univ Groningen, Fac Math & Nat Sci, Zernike Inst Adv Mat, Groningen, Netherlands

年份：2022

卷号：16

期号：3

起止页码：226

外文期刊名：NATURE PHOTONICS

收录：;EI(收录号：20221111797943);WOS:【SCI-EXPANDED(收录号:WOS:000765813900013)】；

基金：This work was supported by the NSFC (21788102, 21636002, 61822504, 51873060 and 21702059), the Shanghai Municipal Science and Technology Major Project (2018SHZDZX03 and 21JC1401700), the Innovation Program of the Shanghai Municipal Education Commission, the Scientific Committee of Shanghai (15XD1501400 and 2021-01-07-00-02-E00107), the China Postdoctoral Science Foundation (2019M661399), the Shanghai Sailing Program (20YF1410500) and the 'Shuguang Program' of the Shanghai Education Development Foundation and Shanghai Municipal Education Commission (21SG29). B.L.F. thanks the financial support from the European Research Council (ERC; advanced grant no. 694345 to B.L.F.) and the Dutch Ministry of Education, Culture and Science (Gravitation program no. 024.001.035). We thank A. Lubbe and Q. Zhang for their suggestions.

语种：英文

外文关键词：Liquid crystals

摘要：Dynamic patterning of soft materials in a fully reversible and programmable manner with light enables applications in anti-counterfeiting, displays and labelling technology. However, this is a formidable challenge due to the lack of suitable chiral molecular photoswitches. Here, we report the development of a unique intrinsic chiral photoswitch with broad chirality modulation to achieve digitally controllable, selectable and extractable multiple stable reflection states. An anti-counterfeiting technique, embedded with diverse microstructures, featuring colour-tunability, erasability, reversibility, multi-stability and viewing-angle dependency of pre-recorded patterns, is established with these photoresponsive superstructures. This strategy allows dynamic helical transformation from the molecular and supramolecular to the macroscopic level using light-activated intrinsic chirality, demonstrating the practicality of photoprogramming photonics. Chiral liquid-crystal materials with optical properties that can be tuned, erased and reversed offer new opportunities in labelling, displays and anti-counterfeiting.