An Artificial Sensory Neuron System Based on Piezo-Ionic Synaptic Transistors with Suspended Porous Ion Gel
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초록
내용
Artificial synaptic device that mimics a biological synapse is an emerging electronic platform that can realize human-like robots when integrated with e-skin. We report an artificial sensory neuron system composed of an artificial synapse and a mechanoreceptor that allows tactile perception and learning based on a pressure sensitive organic electrochemical transistor. Piezopotential created by piezo-ionic gel from external stimuli replaces the external gate bias, enabling low energy consumption of the device. In particular, the precise control of ion migration and trapping in the channel enables an artificial sensory neuron system exhibiting not only highly-sensitive detection of external pressure with different pulse frequencies, but also excellent synaptic learning behaviors such as excitatory postsynaptic current, paired-pulse facilitation and transition of short-term plasticity to long-term plasticity.