Kim, Bo-Yun Hwang, Hyun-Gyu Woo, Jong-Un Lee, Woong-Hee Lee, Tae-Ho Kang, Chong-Yun Nahm, Sahn 2024-01-20T01:31:48Z 2024-01-20T01:31:48Z 2021-09-01 2017-05-26 1884-4049 https://pubs.kist.re.kr/handle/201004/122721 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. English NATURE PUBLISHING GROUP TIMING-DEPENDENT PLASTICITY LONG-TERM POTENTIATION TRIBOELECTRIC NANOGENERATOR MEMRISTOR SYSTEMS ENERGY MEMORY DEVICES PACEMAKER NEURONS Nanogenerator-induced synaptic plasticity and metaplasticity of bio-realistic artificial synapses Article 10.1038/am.2017.64 1 NPG ASIA MATERIALS, v.9 NPG ASIA MATERIALS 9 scie scopus 000402065300001 2-s2.0-85078947054 Materials Science, Multidisciplinary Materials Science Article TIMING-DEPENDENT PLASTICITY LONG-TERM POTENTIATION TRIBOELECTRIC NANOGENERATOR MEMRISTOR SYSTEMS ENERGY MEMORY DEVICES PACEMAKER NEURONS