Figure 5
From: Multipolar spatial electric field modulation for freeform electroactive hydrogel actuation
Rolling the Log. (a) Comparison of the spatial electric field with inversion voltage (Vinv) and without Vinv. The electric field near the boundary between electrodes is ~ 0 when Vinv is applied, but not otherwise. (b) The full width at half maximum (FWHM) in cases of with Vinv and w/o Vinv. Although the |Ey| is partially reduced, the electric field is confined, and the FWHM is small, and it is suitable for precise control. (c,d) Show the roll the log by applying voltage sequentially from right to left. The rolling the log was implemented through a patterned hydrogel hair array. Apply Vact to the electrode pair where the hydrogel hair to be bent is located while applying Vinv to the adjacent electrode pair. The scale bar corresponds to 10 mm.
