Abstract
Dynamic micro/nanoscale patterns responding to environmental stimuli provide an effective solution for tuning surface properties to achieve on-demand smart surfaces. Herein, we propose a simple and robust strategy for constructing multiple-responsive dynamic wrinkle patterns using a conjugated copolymer (P(AEG-AAzo-AAN)). Photodimerization of anthracene and photoisomerization of azobenzene regulate the crosslinking density and stress relaxation ability, respectively, which determine wrinkle generation/erasure and realize the fabrication of on-demand hierarchical wrinkles. Moreover, using a sulfuric acid dopant, the wrinkle patterns are further endowed with humidity responsiveness and semiconductivity. These multiple-responsive dynamic wrinkle patterns are promising for smart displays and anti-counterfeiting tags.
摘要
环境刺激响应的动态微/纳米图案可调节表面特性, 为智能表面 的按需制备提供了有效的解决方案. 我们合成了一种光响应共轭聚合 物(P(AEG-AAzo-AAN)), 基于简单的策略构建了光驱动的双层动态褶 皱图案系统. 聚合物所含蒽侧基的光二聚和偶氮苯侧基的光异构化可 以分别调节交联密度和应力松弛, 从而决定褶皱的产生/擦除, 实现多 级次褶皱的按需制备. 硫酸掺杂后, 褶皱图案能够对湿度做出响应, 薄 膜变为半导体. 这种多重响应动态褶皱可能在智能显示器和防伪标签 中获得潜在的应用.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (52073094, 52273291, 52073092, 52025032 and 12032015) and Shanghai Scientific and Technological Innovation Projects (20ZR1415600).
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Author contributions Qian J, Zhang L, Wang Z and Wu S performed the experiments; Qian J wrote the paper with supporting from Yao Y, Jiang X and Lin S. All authors contributed to the general discussion.
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Jie Qian received his MS degree from East China University of Science and Technology in 2023. He is now working as a research assistant in Prof. Jiang’s lab. His research focuses on the synthesis of photo-responsive polymers and dynamic wrinkles.
Luzhi Zhang received her BS degree from Shanghai Jiao Tong University in 2018. Currently, she is a PhD candidate at Shanghai Jiao Tong University. Her current research focuses on dynamic wrinkle patterns and smart surfaces.
Xuesong Jiang has been working at Shanghai Jiao Tong University since he received his PhD degree from there in 2005. He is now a professor and principal investigator at Shanghai Jiao Tong University. His main research interest focuses on surface patterns and their applications, and he has developed a series of strategies for fabricating dynamic and 2D ordered wrinkles.
Yuan Yao received his PhD degree from Shanghai Jiao Tong University in 2010. After working there as a lecturer for six years, he transferred to East China University of Science and Technology. He is now an associate professor, and his main research interest focuses on photo-responsive polymers and macromolecular self-assemblies.
Supplementary information Experimental details and supporting data are available in the online version of the paper.
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Qian, J., Zhang, L., Wang, Z. et al. Multiple regulation of dynamic wrinkles based on conjugated copolymer network. Sci. China Mater. 67, 363–371 (2024). https://doi.org/10.1007/s40843-023-2684-3
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DOI: https://doi.org/10.1007/s40843-023-2684-3