Fig. 2: Electro-mechanical deformation under contraction-mode DEA operation.
From: Omnidirectional color wavelength tuning of stretchable chiral liquid crystal elastomers
a Schematic representation of the vertical structure of the DEA for negative strain. Donut-shaped compliant electrodes are utilized for contractive deformation. b Top view of the contraction-mode DEA before and after voltage application (r1 > rʹ1, r2 < rʹ2, r3 = rʹ3). c FEA simulation results for the contraction-mode DEA with an applied voltage of 4 kV. d Contractive deformation of the DEA (εa) as a function of the applied voltage when the geometric structure of the compliant electrode (r1, r2) is varied. e Time-dependent contractile deformation of the DEA (εa) with the geometric structure fixed at the optimal condition (r1 = 0.8 cm, r2 = 2.5 cm). f Repeatable driving under an applied voltage of 4 kV for up to 100 cycles. g Macroscopic images at various applied voltages
