2D MoS₂ Neuromorphic Devices for Brain‐Like Computational Systems

TLDR

Hardware implementation of artificial synapses/neurons with 2D solid‑state devices is of great significance for nanoscale brain‑like computational systems. 2D MoS₂ synaptic/neuronal transistors are fabricated using poly(vinyl alcohol) as a laterally coupled, proton‑conducting electrolyte. The devices successfully emulate key synaptic behaviors—including excitatory postsynaptic currents, paired‑pulse facilitation, and dynamic filtering—and demonstrate spiking‑dependent logic, multiplicative coding, and neuronal gain modulation, underscoring their promise for next‑generation nanoscale neuromorphic applications.

Abstract

Hardware implementation of artificial synapses/neurons with 2D solid‐state devices is of great significance for nanoscale brain‐like computational systems. Here, 2D MoS 2 synaptic/neuronal transistors are fabricated by using poly(vinyl alcohol) as the laterally coupled, proton‐conducting electrolytes. Fundamental synaptic functions, such as an excitatory postsynaptic current, paired‐pulse facilitation, and a dynamic filter for information transmission of biological synapse, are successfully emulated. Most importantly, with multiple input gates and one modulatory gate, spiking‐dependent logic operation/modulation, multiplicative neural coding, and neuronal gain modulation are also experimentally demonstrated. The results indicate that the intriguing 2D MoS 2 transistors are also very promising for the next‐generation of nanoscale neuromorphic device applications.