Nanogenerator-induced synaptic plasticity and metaplasticity of bio-realistic artificial synapses
- Authors
- Kim, Bo-Yun; Hwang, Hyun-Gyu; Woo, Jong-Un; Lee, Woong-Hee; Lee, Tae-Ho; Kang, Chong-Yun; Nahm, Sahn
- Issue Date
- 26-5월-2017
- Publisher
- NATURE PUBLISHING GROUP
- Citation
- NPG ASIA MATERIALS, v.9
- Indexed
- SCIE
SCOPUS
- Journal Title
- NPG ASIA MATERIALS
- Volume
- 9
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/83425
- DOI
- 10.1038/am.2017.64
- ISSN
- 1884-4049
- 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.
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Collections - Graduate School > KU-KIST Graduate School of Converging Science and Technology > 1. Journal Articles
- College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
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