LAUSR

Abstract In recent years, neuromorphic computing has attracted close attention. Simulating synaptic plasticity on neuromorphic devices is an important step in hardware based neuromorphic computing. Metaplasticity is a higher-order form of synaptic plasticity. It can regulate the ability of synapse to generate plasticity. Here, chitosan based electrolyte gated protonic/electronic coupled indium-tin-oxide (ITO) neuromorphic transistors are fabricated. The transistor exhibits unique interfacial ionic coupling effects and interfacial electrochemical doping abilities. Thus, metaplastic excitatory postsynaptic current and metaplastic paired-pulses response are achieved on the chitosan gated ITO neuromorphic transistor. Transitions between paired-pulse facilitation and paired-pulse depression are observed. In addition, metaplastic facilitation of long-term potentiation and metaplastic inhibition of long-term potentiation are also successfully imitated. The present work may expand the applications of solid-state electrolyte gated transistors in neuromorphic platforms.