Military Investigates Invertebrates as Model for 3D Printed Active Materials for Robots

(b) Schematic of depositing (3D printing) hydrogel on the surface of a silicone layer after surface treatment and under UV light exposure. (c) Printing of the ionic hydrogel on the passive layer after surface treatment (left), final 3D printed DEA (middle), and microstructure image of the device cross-section ...