Fig. 3: Actuation cyclability and durability of the organic polymer-crystal hybrid materials.

a, b Photographs of P2//3 of straight and bent shapes after cycle 1 and after cycle 1000, induced by humidity (a) and temperature (b), respectively, under UV light for enhanced contrast against the background. c Curvature change of P2//3 during cyclic operation upon variation of either temperature or humidity. d, e Rate of response of P2//3 to humidity (d) and P2//2 to temperature changes (e) and images of the actual crystals in straight and bent states.