Fig. 1.

(a) Schematic representation of the fabrication process for four‐ state thermally responsive grippers. Patterning required four photomasks that were used in sequential order to different ethylene glycol methacrylate solutions. (b) Representative images of grippers. The images show the grippers on a glass slide at different temperatures. (c) Optical images and schematic representations of four‐ state shape changes of grippers during heating and cooling. Scale bars = 2 mm. Reproduced with permission of ref [89]. Copyright 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.