Fig. 4
From: Dielectric gels with ultra-high dielectric constant, low elastic modulus, and excellent transparency
a The voltage-induced deformation of the dielectric gel (left) and VHB 4905 (right). The initial diameter and thickness are the same. b Strain amplitude as a function of the applied voltage measured at room temperature for dielectric gels with 80% polymer content. c Strain amplitude as a function of the applied voltage measured at room temperature for dielectric gels with different polymer contents. d Demonstration of a bioinspired tunable lens made of dielectric gel. The focal length of the lens can be adjusted by varying the applied voltage
