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.

这项研究证明了与纳米发电机（NG）集成在一起的生物逼真的人工突触，可用于神经形态系统。生物相容性无定形（Na _0.5 K _0.5）NbO ₃（NKN）薄膜在TiN /聚酰亚胺衬底上生长，以合成NKN忆阻器，用作人工突触。在NKN忆阻器中实现了各种突触功能，这些功能由脉冲发生器和NG驱动。NKN忆阻器的突触可塑性是由氧空位运动和氧空位细丝形状的变化引起的。作为开发更具生物现实性的人工突触的进一步步骤，我们研究了NKN忆阻器中各种类型的化生作用及其机制。此外，在NKN忆阻器中，由NKN NG提供启动刺激，从而实现了依赖于尖峰时序的可塑性（生物突触的关键特征）的可塑性。