Real-time monitoring and early warning neuromorphic system based on high-endurance three-mode sensing memristors

SnSe materials has a stable layered structure under strong intralayer forces and weak interlayer forces, easily miniaturized and integrated without interface problems. Its unique optoelectronic properties are combined with a memristor which is as a strongest candidate in neuromorphic electronics, are expected to achieve high efficiency and low consumption. Here, we propose a reconfigurable three-mode sensing memristor (Pd/SnSe_1.05/Nb:SrTiO₃) with the coexistence of nonvolatile ramp and threshold switching behaviors. The device exhibits an endurance of 10⁸ cycles and a switching energy of 13.80 fJ, with excellent performance attributed to Pd filaments and Sn vacancy defects. In addition, the memristor not only realizes simple Boolean logic (AND, OR, NAND, NOR) and simulate bio-synaptic long-term potentiation/depression, ect., but also has sensitivity to visible light and human body temperature. Combining the above-mentioned electrical, optical, and thermal sensing modes of SnSe_1.05 memristors, a real-time monitoring and early warning neuromorphic system was built to realize the monitoring of body temperature and blood pressure, and can accurately diagnose blood pressure status and high fever warning with an accuracy of up to 97.30 %. That shows a broad application prospect in the field of non-invasive test and more miniaturized and efficient neuromorphic computing.