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. Author manuscript; available in PMC: 2017 Sep 1.
Published in final edited form as: Nano Energy. 2016 Jul 16;27:275–281. doi: 10.1016/j.nanoen.2016.07.015

Fig. 4. Long-term durability evaluation of the PDMS-packaged PVDF NG.

Fig. 4

(A) Schematic illustration of the mimic bio-environment with ultrasonic wave as the vibration source. (B,C) The voltage output of the PVDF NG at the beginning (B) and after 1 h of ultrasound (C). On and off represent with and without ultrasonic vibration. (D,E) Comparison of in vitro Voc before (D) and after (E) the ultrasound.