Nanogenerator-induced synaptic plasticity and metaplasticity of bio-realistic artificial synapses

Bo Yun Kim; Hyun Gyu Hwang; Jong Un Woo; Woong Hee Lee; Tae Ho Lee; Chong Yun Kang; Sahn Nahm

doi:10.1038/am.2017.64

Nanogenerator-induced synaptic plasticity and metaplasticity of bio-realistic artificial synapses

Bo Yun Kim, Hyun Gyu Hwang, Jong Un Woo, Woong Hee Lee, Tae Ho Lee, Chong Yun Kang, Sahn Nahm

Research output: Contribution to journal › Article › peer-review

64 Citations (Scopus)

Abstract

A bio-realistic artificial synapse integrated with a nanogenerator (NG), which can be used in neuromorphic systems, is demonstrated for self-powered biomedical devices in this study. Biocompatible amorphous (Na_0.5K_0.5)NbO₃ (NKN) films are grown on TiN/polyimide substrates to synthesize NKN memristors for use as artificial synapses. Various synaptic functions are realized in NKN memristors, which are driven by a pulse generator and an NG. The synaptic plasticity of the NKN memristor results from the oxygen vacancy movements and the changes in the shape of the oxygen vacancy filaments. As a further step toward developing more bio-realistic artificial synapses, various types of metaplasticity and their mechanisms in the NKN memristors are investigated. Moreover, the metaplasticity of spike-timing-dependent plasticity (a key characteristic of biological synapses) is realized in the NKN memristor with a priming stimulus given by the NKN NG.

Original language	English
Article number	e381
Journal	NPG Asia Materials
Volume	9
Issue number	5
DOIs	https://doi.org/10.1038/am.2017.64
Publication status	Published - 2017

Bibliographical note

Publisher Copyright:
© The Author(s) 2017.

ASJC Scopus subject areas

Modelling and Simulation
General Materials Science
Condensed Matter Physics

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title = "Nanogenerator-induced synaptic plasticity and metaplasticity of bio-realistic artificial synapses",

abstract = "A bio-realistic artificial synapse integrated with a nanogenerator (NG), which can be used in neuromorphic systems, is demonstrated for self-powered biomedical devices in this study. Biocompatible amorphous (Na0.5K0.5)NbO3 (NKN) films are grown on TiN/polyimide substrates to synthesize NKN memristors for use as artificial synapses. Various synaptic functions are realized in NKN memristors, which are driven by a pulse generator and an NG. The synaptic plasticity of the NKN memristor results from the oxygen vacancy movements and the changes in the shape of the oxygen vacancy filaments. As a further step toward developing more bio-realistic artificial synapses, various types of metaplasticity and their mechanisms in the NKN memristors are investigated. Moreover, the metaplasticity of spike-timing-dependent plasticity (a key characteristic of biological synapses) is realized in the NKN memristor with a priming stimulus given by the NKN NG.",

author = "Kim, {Bo Yun} and Hwang, {Hyun Gyu} and Woo, {Jong Un} and Lee, {Woong Hee} and Lee, {Tae Ho} and Kang, {Chong Yun} and Sahn Nahm",

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AU - Kim, Bo Yun

AU - Hwang, Hyun Gyu

AU - Woo, Jong Un

AU - Lee, Woong Hee

AU - Lee, Tae Ho

AU - Kang, Chong Yun

AU - Nahm, Sahn

PY - 2017

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N2 - A bio-realistic artificial synapse integrated with a nanogenerator (NG), which can be used in neuromorphic systems, is demonstrated for self-powered biomedical devices in this study. Biocompatible amorphous (Na0.5K0.5)NbO3 (NKN) films are grown on TiN/polyimide substrates to synthesize NKN memristors for use as artificial synapses. Various synaptic functions are realized in NKN memristors, which are driven by a pulse generator and an NG. The synaptic plasticity of the NKN memristor results from the oxygen vacancy movements and the changes in the shape of the oxygen vacancy filaments. As a further step toward developing more bio-realistic artificial synapses, various types of metaplasticity and their mechanisms in the NKN memristors are investigated. Moreover, the metaplasticity of spike-timing-dependent plasticity (a key characteristic of biological synapses) is realized in the NKN memristor with a priming stimulus given by the NKN NG.

AB - A bio-realistic artificial synapse integrated with a nanogenerator (NG), which can be used in neuromorphic systems, is demonstrated for self-powered biomedical devices in this study. Biocompatible amorphous (Na0.5K0.5)NbO3 (NKN) films are grown on TiN/polyimide substrates to synthesize NKN memristors for use as artificial synapses. Various synaptic functions are realized in NKN memristors, which are driven by a pulse generator and an NG. The synaptic plasticity of the NKN memristor results from the oxygen vacancy movements and the changes in the shape of the oxygen vacancy filaments. As a further step toward developing more bio-realistic artificial synapses, various types of metaplasticity and their mechanisms in the NKN memristors are investigated. Moreover, the metaplasticity of spike-timing-dependent plasticity (a key characteristic of biological synapses) is realized in the NKN memristor with a priming stimulus given by the NKN NG.

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Nanogenerator-induced synaptic plasticity and metaplasticity of bio-realistic artificial synapses

Abstract

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ASJC Scopus subject areas

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