Figure 4. Droplet impact onto a hydrophilic arc on a superhydrophobic background demonstrating vectoring behavior when We = 100.

The wettable arc can be seen (after being wetted) in the late stages of this event (after 9 ms). Note the formation of a small satellite droplet at 10.7 ms. The initial drop size was D₀ = 2.1 mm and the arc had the following geometry, r_o = 3.29 mm, w_o = 0.20 mm (refer to SI for a link to the full video, Video S2).