Anisotropic Signal Processing with Trigonal Selenium Nanosheet Synaptic Transistors

Jing Kai Qin, Feichi Zhou, Jingli Wang, Jiewei Chen, Cong Wang, Xuyun Guo, Shouxin Zhao, Yi Pei, Liang Zhen, Peide D. Ye, Shu Ping Lau, Ye Zhu, Cheng Yan Xu, Yang Chai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Hardware implementation of an artificial neural network requires neuromorphic devices to process information with low energy consumption and high heterogeneity. Here we demonstrate an electrolyte-gated synaptic transistor (EGT) based on a trigonal selenium (t-Se) nanosheet. Due to the intrinsic low conductivity of the Se channel, the t-Se synaptic transistor exhibits ultralow energy consumption, less than 0.1 pJ per spike. More importantly, the intrinsic low symmetry of t-Se offers a strong anisotropy along its c- and a-axis in electrical conductance with a ratio of up to 8.6. The multiterminal EGT device exhibits an anisotropic response of filtering behavior to the same external stimulus, which enables it to mimic the heterogeneous signal transmission process of the axon-multisynapse biostructure in the human brain. The proof-of-concept device in this work represents an important step to develop neuromorphic electronics for processing complex signals.

Original languageEnglish
Pages (from-to)10018-10026
Number of pages9
JournalACS Nano
Volume14
Issue number8
DOIs
Publication statusPublished - 25 Aug 2020

Keywords

  • anisotropic response
  • electrolyte-gated transistor
  • synaptic device
  • t-Se nanosheet
  • van der Waals crystals

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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