Two-Dimensional MXene Synapse for Brain-Inspired Neuromorphic Computing

MXenes, an emerging class of two-dimensional (2D) transition metal carbides and nitrides, have attracted wide attention because of their fascinating properties required in functional electronics. Here, an atomic-switch-type artificial synapse fabricated on Ti3C2Tx MXene nanosheets with lots of surface functional groups, which successfully mimics the dynamics of biological synapses, is reported. Through in-depth analysis by X-ray photoelectron spectroscopy, transmission electron microscopy, and energy dispersive X-ray spectroscopy, it is found that the synaptic dynamics originated from the gradual formation and annihilation of the conductive metallic filaments on the MXene surface with distributed functional groups. Subsequently, via training and inference tasks using a convolutional neural network for the Canadian-Institute-For-Advanced-Research-10 dataset, the applicability of the artificial MXene synapse to hardware neural networks is demonstrated.

Automated summary

The study found that synaptic dynamics originated from the gradual formation and annihilation of conductive metallic filaments on the MXene surface with distributed functional groups. Through training and inference tasks using a convolutional neural network for the Canadian Institute For Advanced Research-10 dataset, the applicability of the artificial MXene synapse to hardware neural networks was demonstrated.