From Pain to Fear Recognition via Pavlovian Learning in an Organic–Inorganic Hybrid Neuromorphic Transistor

Abstract The pain perception system is of great importance for the human body to perceive noxious stimuli in external environment and make an appropriate reaction. Therefore, the hardware realization of nociceptors using emerging solid‐state device is of great importance toward the next‐generation intelligent electronic devices. However, at present, the pain recognition with threshold regulation is still very lacking by using the solid‐state device. Herein, a novel pain‐perceptual device based on organic–inorganic hybrid MoS 2 transistor is fabricated by using polyvinyl alcohol‐based electrolyte. The key characteristics of pain perception, such as threshold, sensitization, and desensitization behaviors, are realized in the organic–inorganic hybrid neuromorphic transistor based on the unique ion migration mechanism. Most importantly, the device exhibits a clear transition from pain to fear recognition through the Pavlovian training. These results provide a promising strategy to the next generation of bio‐inspired electronic devices, smart healthcare, cognitive electronics, etc.