Redox MXene Artificial Synapse with Bidirectional Plasticity and Hypersensitive Responsibility

Artificial synapses are key elements for the nervous system which is an emulation of sensory and motor neuron signal transmission. Here, the design and fabrication of redox‐behavior the metal carbide nanosheets, termed MXene artificial synapse, which uses a highly‐conductive MXene electrode, are reported. Benefiting from the special working mechanism of ion migration with adsorption and insertion, the device achieves world‐record power consumption (460 fW) of two‐terminal synaptic devices, and so far, the bidirectionally functioned synaptic device could effectively respond to ultra‐small stimuli at an amplitude of ±80 mV, even exceeding that of a biological synapse. Potential applications have also been demonstrated, such as dendritic integration and memory enhancement. The special strategy and superior electrical characteristics of the bidirectionally functioned electronic device pave the way to high‐power‐efficiency brain‐inspired electronics and artificial peripheral systems. A redox‐behavior metal carbide nanosheet, termed MXene artificial synapse, is designed and fabricated, which exhibits bidirectionally short‐term plasticity and excellent responsibility to millivolt‐level stimuli. The device is used in dendritic engineering for conditional learning, logic operation, emotional regulation, and memory enhancement. These properties are applicable to future low‐power and hypersensitive brain‐inspired electronics.