文献类型：期刊文献

英文题名：Phase-transition-induced dynamic surface wrinkle pattern on gradient photo-crosslinking liquid crystal elastomer

作者：Wen, Tao[1,2];Ma, Tianjiao[2];Qian, Jie[2];Song, Zhaoxin[3];Jiang, Xuesong[2];Yao, Yuan[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Frontiers Sci Ctr Transformat Mol, State Key Lab Met Matrix Composite Mat, Shanghai, Peoples R China;[3]Tiangong Univ, Sch Text Sci & Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin, Peoples R China

年份：2024

卷号：15

期号：1

外文期刊名：NATURE COMMUNICATIONS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001386371400037)】；

基金：Y.Y. acknowledges the financial support of the National Natural Science Foundation of China (52073094, 52273291), X.J. acknowledges the support of the National Natural Science Foundation of China (52025032) and Shanghai Scientific and Technological Innovation Projects (20ZR1415600), T.M. acknowledges the financial support postdoctoral Fellowship Program of CPSF (GZC20231544). We would like to extend our sincere thanks to Professor Jianqi Zhang of the National Center for Nanoscience and Technology for his help in WAXS characterization.

语种：英文

摘要：Liquid crystal elastomers (LCEs) with various deformation properties based on phase transition were widely used as actuators and provided potential to fabricate functional surfaces with tunable microstructure. Herein, we demonstrate a strategy to fabricate dynamic micro wrinkles on LCE surfaces based on LC phase transition. Stable micron-sized surface wrinkles on the anthracene-containing LCE film (AnLCE) are fabricated by ultraviolet exposure induced gradient cross-linking and subsequently stretching-releasing (UV-SR). The surface wrinkle is stabilized by the orientation of liquid crystal mesogens in the crosslinked top layer, while it can be erased by heating due to the isotropic phase-transition and recovered by stretching-releasing again. The dynamic natures cooperated with multi display modes under natural light, UV light and polarized light enable wrinkled AnLCE as a dynamic and multi-mode display platform. This strategy provide a path for modifying LCEs and regulating surface polarized images via wrinkling, which may be potential in soft sensors and optics, smart windows and anti-counterfeiting.