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. 2020 Aug 3;10:13032. doi: 10.1038/s41598-020-70031-z

Figure 2.

Figure 2

(a) The experimental setup for recording current and voltage upon tapping at various frequencies, (b) testing the flexibility of TENG device, (c) Open-circuit voltage, (d) Short circuit current, of the fabricated TiO2 TENG under frequencies from 1 to 4 Hz.