Abstract
Temperature-sensitive properties of artificial electronic synapses allow the devices to have both bionanomimetic and sensor functions, which are promising for the research of improving bio-neuro-bionic systems. In this article, an ITO/TiOy/TiOx/TiN memristor with a stacked layer structure was prepared to achieve a gradual modulation of the operating current by depositing the oxygen-deficient layer TiOy. The devices exhibit clear sensitivity and stable retention over the temperature range of 299K–349K for 1000 s, while the 1000 endurance cycles allow for biosynaptic analog modulation capabilities, including paired-pulse facilitation (PPF) and spike-timing-dependent plasticity (STDP) at room temperature. The mechanism of conductivity based on oxygen diffusion dynamics can be well demonstrated by high-resolution transmission electron microscopy (HRTEM) and X-ray photoelectron spectroscopy (XPS) analysis. Furthermore, the sensing-storage integrated 1S1M system based on the ITO/TiOy/TiOx/TiN memristor provides a reasonable conception for the bionic research of biological nervous systems.
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