Journal
NANO ENERGY
Volume 55, Issue -, Pages 516-525Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2018.10.049
Keywords
PVDF/ZnO; Cowpea-structured nanofiber; Bending monitoring; Self-powered; Human-machine interaction
Categories
Funding
- National Natural Science Foundation of China [61801403]
- Scientific and Technological Projects for International Cooperation of Sichuan Province [2017HH0069]
- National Key Research and Development Plan [2016YFB1200401-102E]
- Independent Research Project of State Key Laboratory of Traction Power [2017TPL_Z04]
- Fundamental Research Funds for the Central Universities of China [2682017CY06, 2682017ZDPY01, 2682017CX071]
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Interactive human-machine interface (iHMI) is a bridge connecting human beings and robots, which has an important requirement for perceiving the change of pressure and bending angle. Here, we designed a flexible self-powered piezoelectric sensor (PES) based on the cowpea-structured PVDF/ZnO nanofibers (CPZNs) for remote control of gestures in human-machine interactive system. Due to the synergistic piezoelectric effect of hybrid PVDF/ZnO and the flexibility of polymer, this PES exhibited excellent bending sensitivity of 4.4 mV deg(-1) ranging widely from 44 degrees to 122 degrees, fast response time of 76 ms, and good mechanical stability. Besides, the PES could operate under both bending and pressing mode, show ultrahigh pressing sensitivity of 0.33 V kPa(-1), with response time of 16 ms. When integrated in iHMI, the PES could be conformably covered on different curve surfaces, demonstrated accurate bending angle recording and fast recognition for realizing intelligent human-machine interaction. On this basis, the application of remote control of robotic hand was successfully realized in form of acting the same gesture as human hand synchronously. This CPZNs-based self-powered PES is distinct and unique in its structure and fundamental mechanism, and exhibits a prospective potential application in iHMI.
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