Self-powered thin-film motion vector sensor

Qingshen Jing, Yannan Xie, Guang Zhu, Ray P. S. Han () and Zhong Lin Wang ()
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Qingshen Jing: College of Engineering, Peking University
Yannan Xie: School of Materials Science and Engineering, Georgia Institute of Technology
Guang Zhu: School of Materials Science and Engineering, Georgia Institute of Technology
Ray P. S. Han: College of Engineering, Peking University
Zhong Lin Wang: School of Materials Science and Engineering, Georgia Institute of Technology

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Harnessing random micromeso-scale ambient energy is not only clean and sustainable, but it also enables self-powered sensors and devices to be realized. Here we report a robust and self-powered kinematic vector sensor fabricated using highly pliable organic films that can be bent to spread over curved and uneven surfaces. The device derives its operational energy from a close-proximity triboelectrification of two surfaces: a polytetrafluoroethylene film coated with a two-column array of copper electrodes that constitutes the mover and a polyimide film with the top and bottom surfaces coated with a two-column aligned array of copper electrodes that comprises the stator. During relative reciprocations, the electrodes in the mover generate electric signals of ±5 V to attain a peak power density of ≥65 mW m−2 at a speed of 0.3 ms−1. From our 86,000 sliding motion tests of kinematic measurements, the sensor exhibits excellent stability, repeatability and strong signal durability.

Date: 2015
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DOI: 10.1038/ncomms9031

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