Figure 2 | Scientific Reports

Figure 2

From: Self-propelled droplet transport on shaped-liquid surfaces

Figure 2

Rail geometry used to create gradients of wettability on super-hydrophobic and liquid surfaces. (a) Parallel rails with divergent width along their length. The center-lines of two consecutive rails are separated by \({75}\, \upmu {\hbox {m}}\). The solid surface area evolves from \(f_s=0\) on the left to \(f_s=1\) on the right. (b,c) SEM images of the divergent rails at two different positions. The scale bars are \({75}\, \upmu {\hbox {m}}\).

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