Neural synapse-imitated flexible pressure sensor and preparation method thereof

The invention relates to a neural synapse-imitated flexible pressure sensor and a preparation method thereof. The sensor comprises an upper flexible substrate, an upper electrode, an upper sensitive layer, a lower sensitive layer, a lower electrode and a lower flexible substrate, the upper sensitive layer is composed of a semispherical convex microstructure at the tail end of a simulated neuron axon and a three-dimensional porous graphene conducting layer on the surface of the semispherical convex microstructure; the lower sensitive layer is composed of a cylindrical concave structure simulating the tail end of the neuron dendrite and a secondary rough microstructure on the surface of the cylindrical concave structure. The cylindrical sunken structures are used as bottom supports and are in one-to-one correspondence with the convex microstructures to form a neuronal synapse imitating multi-scale sensitive microstructure; the upper electrode is located on the surface of the upper flexible substrate, and the lo