Neuromorphic Sensorimotor Loop Embodied by Monolithically Integrated Low-Voltage, Soft E-Skin

Artificial skin that simultaneously mimics the sensory feedback and mechanical properties of natural skin holds significant promise for next-generation robotic and medical devices. However, achieving such a biomimetic system that can seamlessly integrate with the human body remains a challenge. Through rational design and engineering of material properties, device structures, and system architectures, we realize a monolithic soft prosthetic e-skin without rigid electronic components. It is capable of multimodal sensing, neuromorphic pulse train signal generation, and closed-loop actuation. With a tri-layer high-κ elastomeric dielectric, we achieved low sub-threshold swing comparable to poly-Si transistors, low operation voltage, low static power consumption, and medium-scale circuit integration complexity for stretchable organic devices.Our e-skin mimicked the biological sensorimotor loop where a solid-state synaptic transistor elicited stronger muscle actuation when increased pressure stimuli was applied.