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Electrolyte‐Gated Vertical Synapse Array based on Van Der Waals Heterostructure for Parallel Computing

Recently, three‐terminal synaptic devices, which separate read and write terminals, have attracted significant attention because they enable nondestructive read‐out and parallel‐access for updating synaptic weights. However, owing to their structural features, it is difficult to address the relative...

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Autores principales: Oh, Seyong, Lee, Ju‐Hee, Seo, Seunghwan, Choo, Hyongsuk, Lee, Dongyoung, Cho, Jeong‐Ick, Park, Jin‐Hong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8867203/
https://www.ncbi.nlm.nih.gov/pubmed/34957687
http://dx.doi.org/10.1002/advs.202103808
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author Oh, Seyong
Lee, Ju‐Hee
Seo, Seunghwan
Choo, Hyongsuk
Lee, Dongyoung
Cho, Jeong‐Ick
Park, Jin‐Hong
author_facet Oh, Seyong
Lee, Ju‐Hee
Seo, Seunghwan
Choo, Hyongsuk
Lee, Dongyoung
Cho, Jeong‐Ick
Park, Jin‐Hong
author_sort Oh, Seyong
collection PubMed
description Recently, three‐terminal synaptic devices, which separate read and write terminals, have attracted significant attention because they enable nondestructive read‐out and parallel‐access for updating synaptic weights. However, owing to their structural features, it is difficult to address the relatively high device density compared with two‐terminal synaptic devices. In this study, a vertical synaptic device featuring remotely controllable weight updates via e‐field‐dependent movement of mobile ions in the ion‐gel layer is developed. This synaptic device successfully demonstrates all essential synaptic characteristics, such as excitatory/inhibitory postsynaptic current (E/IPSC), paired‐pulse facilitation (PPF), and long‐term potentiation/depression (LTP/D) by electrical measurements, and exhibits competitive LTP/D characteristics with a dynamic range (G (max)/G (min)) of 31.3, and asymmetry (AS) of 8.56. The stability of the LTP/D characteristics is also verified through repeated measurements over 50 cycles; the relative standard deviations (RSDs) of G (max)/G (min) and AS are calculated as 1.65% and 0.25%, respectively. These excellent synaptic properties enable a recognition rate of ≈99% in the training and inference tasks for acoustic and emotional information patterns. This study is expected to be an important foundation for the realization of future parallel computing networks for energy‐efficient and high‐speed data processing.
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spelling pubmed-88672032022-02-27 Electrolyte‐Gated Vertical Synapse Array based on Van Der Waals Heterostructure for Parallel Computing Oh, Seyong Lee, Ju‐Hee Seo, Seunghwan Choo, Hyongsuk Lee, Dongyoung Cho, Jeong‐Ick Park, Jin‐Hong Adv Sci (Weinh) Research Articles Recently, three‐terminal synaptic devices, which separate read and write terminals, have attracted significant attention because they enable nondestructive read‐out and parallel‐access for updating synaptic weights. However, owing to their structural features, it is difficult to address the relatively high device density compared with two‐terminal synaptic devices. In this study, a vertical synaptic device featuring remotely controllable weight updates via e‐field‐dependent movement of mobile ions in the ion‐gel layer is developed. This synaptic device successfully demonstrates all essential synaptic characteristics, such as excitatory/inhibitory postsynaptic current (E/IPSC), paired‐pulse facilitation (PPF), and long‐term potentiation/depression (LTP/D) by electrical measurements, and exhibits competitive LTP/D characteristics with a dynamic range (G (max)/G (min)) of 31.3, and asymmetry (AS) of 8.56. The stability of the LTP/D characteristics is also verified through repeated measurements over 50 cycles; the relative standard deviations (RSDs) of G (max)/G (min) and AS are calculated as 1.65% and 0.25%, respectively. These excellent synaptic properties enable a recognition rate of ≈99% in the training and inference tasks for acoustic and emotional information patterns. This study is expected to be an important foundation for the realization of future parallel computing networks for energy‐efficient and high‐speed data processing. John Wiley and Sons Inc. 2021-12-26 /pmc/articles/PMC8867203/ /pubmed/34957687 http://dx.doi.org/10.1002/advs.202103808 Text en © 2021 The Authors. Advanced Science published by Wiley‐VCH GmbH https://creativecommons.org/licenses/by/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Oh, Seyong
Lee, Ju‐Hee
Seo, Seunghwan
Choo, Hyongsuk
Lee, Dongyoung
Cho, Jeong‐Ick
Park, Jin‐Hong
Electrolyte‐Gated Vertical Synapse Array based on Van Der Waals Heterostructure for Parallel Computing
title Electrolyte‐Gated Vertical Synapse Array based on Van Der Waals Heterostructure for Parallel Computing
title_full Electrolyte‐Gated Vertical Synapse Array based on Van Der Waals Heterostructure for Parallel Computing
title_fullStr Electrolyte‐Gated Vertical Synapse Array based on Van Der Waals Heterostructure for Parallel Computing
title_full_unstemmed Electrolyte‐Gated Vertical Synapse Array based on Van Der Waals Heterostructure for Parallel Computing
title_short Electrolyte‐Gated Vertical Synapse Array based on Van Der Waals Heterostructure for Parallel Computing
title_sort electrolyte‐gated vertical synapse array based on van der waals heterostructure for parallel computing
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8867203/
https://www.ncbi.nlm.nih.gov/pubmed/34957687
http://dx.doi.org/10.1002/advs.202103808
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