Two-dimensional molybdenum disulfide artificial synapse with high sensitivity

Abstract

This paper reports the fabrication of an artificial synapse (AS) based on two-dimensional molybdenum disulfide (MoS2) film. The AS emulates important synaptic functions such as paired-pulse facilitation, spike-rate dependent plasticity, spike-duration dependent plasticity and spike-number dependent plasticity. The spike voltage can mediate ion migration in the ion gel to regulate the MoS2 conductive channel, thereby realizing the emulation of synaptic plasticity. More importantly, benefiting from the atomically-flat surface of MoS2 film, the device has a high sensitivity to external stimuli. It can effectively respond to presynaptic spikes that have an amplitude of 100 mV. The development of this device provides a new idea for constructing a highly-sensitive and multifunctional neuromorphic system.

Flexible optoelectronic neural transistors with broadband spectrum sensing and instant electrical processing for multimodal neuromorphic computing

“…By counting the spikes for certain groups, 26 letters and 10 numbers can be identified (Figure 5D and Supporting Information: Figure ). Compared with other reported Morse‐coding systems that use neural devices, our system exhibits weaker recognition noise and higher reliability, due to a stable and well‐defined STP (Supporting Information: Table ) 44–47 . As a demonstration, the name of our device “OENT” was recognized correctly using a real circuit (Figure 5E).…”

“…Compared with other reported Morse-coding systems that use neural devices, our system exhibits weaker recognition noise and higher reliability, due to a stable and well-defined STP (Supporting Information: Table S2). [44][45][46][47] As a demonstration, the name of our device "OENT" was recognized correctly using a real circuit (Figure 5E).…”

Editorial: Focus issue on 2D materials for neuromorphic computing

“…In Huang et al [2], chemical vapor deposition (CVD) -grown 2D MoS 2 films were used to fabricate an artificial electronic synapse, in which ion migration in the gate terminal was employed to modulate the conductance of the device. In this way, they realized emulation of synaptic functions, such as paired-pulse facilitation, spike-rate-dependent plasticity, spike-duration-dependent plasticity and spike-number-dependent plasticity.…”