fig7

Figure 7. Design of actuator based on LIG. (A) Preparation process of U-type electrothermal actuator. (B) Design of 2D precursor and fixed nodes for flower stamen, epiphytic orchid, and foldable quatrefoil. (C) Photographs of bionic frog tongue grasping insects on the table. Reproduced with permission^[130]. Copyright 2020, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. (D) Photograph of a 3D frog and its temperature distribution under light illumination. (E), Positions of a 3D frog at different times. (F) The movement path of the 3D frog under light illumination. Reproduced with permission^[131]. Copyright 2021, WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.