Abstract
Flexible and wearable electronics has presented an opportunity to evolve our society into an intelligent world. Especially for biomechanical sensing and gesture recognition, wearable devices are quite indispensable. Here, we present a nestable arched triboelectric nanogenerator (NA-TENG), which can be wore on fingers, acting as a large deflection biomechanical sensor and energy harvester. With arched structure, the sensor can detect large bending angle of fingers with good stability. Meanwhile, the NA-TENG devices can be assembled like matryoshka, which greatly increases the extensibility for optimizing output performance of the NA-TENG, and provides a convenient method to regulate characteristics of TENG devices in wearable applications.
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