A Versatile Self-Powered Triboelectric Sensor Platform That Converts Irregular Mechanical Motion into Steady Vibration (May 12, 2026)

A research team led by Professor Kim Jong-baek of the Department of Mechanical Engineering has developed a self-powered sensor platform capable of stable environmental and chemical sensing regardless of changes in external inputs by converting irregular mechanical motion into constant vibrations. The research team applied a magnetic latching mechanism to a triboelectric generator composed of a cantilever and a flexible film with a deflection structure, thereby implementing a structure in which stored elastic energy is released and natural vibrations are generated when the input displacement exceeds a threshold value. This generated a stable electrical signal that maintained output deviation at 9.6% or less, even as the input displacement (25–35 mm) and input frequency (0.1–1 Hz) varied. Furthermore, by replacing only the active layer on the same platform to implement humidity and ammonia sensors, we demonstrated that stable self-powered sensing performance, independent of changes in mechanical input, can be achieved even when various sensor materials are applied. The fabricated platform achieved a maximum output of 170.8 μW and demonstrated operational stability over more than 20,000 cycles, highlighting its potential as a versatile self-powered sensor platform applicable to wearable and portable environmental and chemical sensors. The results of this study were published in *Microsystems & Nanoengineering*.

Link to the related paper: https://www.nature.com/articles/s41378-026-01306-0