Multiresponsive reversible wrinkling
patterns provide an effective
approach to dynamically tuning the properties of surface on-demand
to realize a smart surface; however, their fabrication remains challenging.
In this study, we report a simple yet robust method to fabricate multiresponsive
wrinkles based on a supramolecular polymer network composed of copolymer
(P4VP-PS-PnBA) and carboxyl containing anthracene (AN-COOH), which
can be cross-linked dynamically through reversible photodimerization
of anthracene (AN) and the hydrogen bond between carboxyl and pyridine
groups. The wrinkle pattern can be generated and erased selectively
by UV radiation of different wavelengths due to reversible dimerization
of AN. The resulting wrinkles have an extremely sensitive response
to hydrogen chloride (HCl) gas and can be erased by HCl with a concentration
of 5 ppm in the atmosphere. The generation/elimination process responsive
to light and HCl could be cycled many times without damaging characteristic
wrinkles, which enables this dynamic wrinkle pattern to be employed
for such potential applications as smart displays and nonink printing
