Coplanar Multigate MoS₂ Electric-Double-Layer Transistors for Neuromorphic Visual Recognition

Abstract

Spatial coordinate and visual orientation recognition in cortical cells play important roles in the visual system. Herein, spatiotemporally processed visual neurons are mimicked by a facile coplanar multigate two-dimensional (2D) MoS electric-double-layer transistor with proton-conducting poly(vinyl alcohol) electrolytes as laterally coupled gate dielectrics. Fundamental neuromorphic behaviors, e.g., excitatory postsynaptic current and paired-pulse facilitation, were successfully mimicked. For the first time, a proof-of-principle artificial visual neural network system for mimicking spatiotemporal coordinate and orientation recognition was experimentally demonstrated in such devices. The experimental results provide a promising opportunity for adding intelligent spatiotemporally-processed functions in emerging brain-like neuromorphic nanoelectronics.

Ionotronic Neuromorphic Devices for Bionic Neural Network Applications

“…Dynamic logic is a temporal correlated coding biological function and realized by inputting precise timing and information‐encoded presynaptic spikes. To realize logic functions, multi‐gate terminals/inputs are needed on ionotronic transistors . As comparison, multi‐memristors connected with each other, or memristors with multi‐inputs are needed to realize logic functions.…”

“…multi-gate terminals/inputs are needed on ionotronic transistors. [121,139,140] As comparison, multi-memristors connected with each other, [124,141] or memristors with multi-inputs [142] are needed to realize logic functions. For example, Liu et al [121] reported a freestanding chitosan-gated IZO neuromorphic transistors with three coplanar gate electrodes to realize spike logic operation and modulation, as schematically shown in Figure 9a.…”

Artificial Perception Built on Memristive System: Visual, Auditory, and Tactile Sensations

“…It is worth noting that, besides color and contrast sensing, visual perception encompasses a wider range of informative content and context. Emerging reports have focused on the application of memristive systems for spatial position and visual orientation perceptions . Although these reports have yet to integrate memristors with visual sensors, the wider application potential of memristive systems for the construction of multiple functional visual perception has been successfully demonstrated.…”

2D Layered Materials for Memristive and Neuromorphic Applications

“…Electron. More complex applications such as spatiotemporal coordinate and orientation recognition [142] can be achieved through assembling multiple input gates into designed arrays. 2020, 6,1901107 www.advelectronicmat.de Different from two-terminal ionic devices, three-terminal ionic gating devices based on 2D layered materials enable to decouple write operations from read operations.…”

“…In addition, spin offers a new degree of freedom for memristive devices designing. [142,181] In summary, 2D layered materials show huge potential in development of memristive and neuromorphic devices with low power consumption and multifunctionalities. The feasibility is illustrated by the recent work using the current-driven spin-orbit torque reversal in heterostructures.…”