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. 2022 Jan 31;9(10):2104168. doi: 10.1002/advs.202104168

Figure 4.

Figure 4

The basic principles, characterizations, and performances of DE‐THS and SE‐THS: Open‐circuit voltage variation under different pressures of four kinds of DE‐THS: a) Plain DE‐THS; b) DE‐THS with micro‐pyramid‐patterned PDMS and plain hydrogel; c) DE‐THS with micro‐pyramid‐patterned hydrogel and plain PDMS; d) DE‐THS with both micro‐pyramid‐patterned PDMS and hydrogel. e) Schematic illustration of the working principle of DE‐THS and SE‐THS. f) Voltage curves under different applied pressures of plain SE‐THS and micro‐pyramid‐patterned SE‐THS. g) Open‐circuit voltage variation under different pressures of plain SE‐THS and micro‐pyramid‐patterned SE‐THS. h) Dependence of the output on the external resistance load of plain SE‐THS and micro‐pyramid‐patterned SE‐THS. i) Dependence of the power density on the resistance of external load of plain SE‐THS and micro‐pyramid‐patterned SE‐THS.