Screen-Printed Parallel-Stripes Electrodes Toward Oriented Piezoelectric Nanofibers Sensors for Both Stability and Sensitivity Improvement

Piezoelectric nanofibers sensors cannot be mass-produced due to the limitation of electrode technology. Herein, we proposed a parallel-stripes electrode pattern for the first time, which enables using the screen-printing technology to print electrodes on piezoelectric nanofibers mats to prepare piezoelectric nanofibers sensors. Firstly, combining PVDF-TrFE nanofibers with different electrodes to prepare piezoelectric sensors and comparing their sensitivity, we prove that PVDF-TrFE nanofibers sensor based on parallel-stripes electrode has piezoelectric output. What is more, the sensor has the highest sensitivity when the parallel-stripes electrode is parallel to the oriented piezoelectric nanofibers. And then, we directly printed parallel-stripes electrode on oriented PVDF-TrFE nanofibers mat, and the vibration test of 50,000 cycles verifies that the PVDF-TrFE nanofibers sensor prepared by this way possess satisfactory stability. Our research provides a new electrode pattern for preparing stable and reliable electrodes for piezoelectric nanofibers sensors via screen printing. Moreover, this electrode further increases the sensitivity of the piezoelectric nanofibers sensor.