Ionotronic Oxide Neuromorphic Transistor Arrays with Structural Plasticity for Visual-Tactile Perception Application

Biological neural networks achieve efficient information processing through complex connectivity and synaptic plasticity, inspiring the design of neuromorphic systems. Here, a chitosan-based electrolyte-gated indium zinc oxide (IZO) ionotronic neuromorphic transistor array with a dual-channel structure is fabricated, demonstrating rich synaptic functions, including structural plasticity, enhanced synaptic weight, and target learning. The array with the shared bottom gate emulates “one-to-many” connections of biological neural networks, realizing synchronized signal transmission and parallel processing. Benefiting from the intrinsic photoresponses of the sputtered IZO channel, the array can perceive and map the in-plane distribution of incident light. In particular, the integration of a triboelectric nanogenerator with a neuromorphic transistor enables the construction of an artificial mechano-nociceptive system to mimic peripheral sensitization and analgesic effects of biological nociceptive systems. This work provides a promising strategy for integrated neuromorphic systems with advanced synergetic perceptual functions and neuromorphic computing.