Device structures and working mechanisms of interfacial engineering-based triboelectric sensor (IETS). (IMAGE)
Caption
Device structures and working mechanisms of interfacial engineering-based triboelectric sensor (IETS). a Concept of a wearable wireless monitoring system based on highly sensitive IETS for pulse-wave detection. b Structure and equivalent circuit model of IETS. c Silicone rubber with mountain-like microstructures reversed through the carved PMMA mold (scale bar, 500 µm). d SEM image of piezo-frustums microstructures (scale bar, 500 µm). e Photograph of real testing scenario based on IETS for driver’s pulse wave monitoring. f Schematic illustration of the interfacial engineering. he left panel shows the challenges of traditional microstructures under a prestress. The right panel illustrates the working mechanism of the interfacial stress engineering. g Simulation results of sensor with and without interfacial stress optimization microstructures.
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Microsystems & Nanoengineering
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