Multiple regulation of dynamic wrinkles based on conjugated copolymer network

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.