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. 2020 Aug 10;6:56. doi: 10.1038/s41378-020-0163-1

Fig. 2. Working principle of the power generation unit in the horizontal axial and vertical lateral directions.

Fig. 2

a Capacitance variation versus length of the W-TENG; b, c contour snapshots of the electric field distribution in stretched and compressed states in the horizontal axial direction; d capacitance variation versus height of the W-TENG; e, f contour snapshots of the electric field distribution in stretched and compressed states in the vertical lateral direction