FIG. 1. (a-i) Schematic of the substrate used for the condensation experiments. Schematics of the interdigitated electrode (electrode-gap) designs are also shown here—(a-ii) straight interdigitated electrodes and (a-iii) zigzag interdigitated electrodes; the distance l between the consecutive triangular elements is varied to create different electrode designs. (b) Comparison between condensate droplet patterns (at approximately the same time instant) (i) without EW and under EW (Urms¼ 150 V; f¼ 1 kHz) with different electrode designs, (ii) straight interdigitated electrodes, and zigzag interdigitated electrodes with (iii) l¼ 1000 lm and (iv) l¼ 3000 lm. Gravity points from top to bottom along the electrodes. The yellow bars in (b) represent 1 mm.
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