Fig. 4. The splash inhibition of vesicle AOT generalizes to other superhydrophobic surfaces.
(A1 and A2) SEM images of silicon nanowire–arrayed surface from top and side views. (C1 and C2) SEM images of patterned superhydrophobic surfaces with arrayed silicon micropillars and nanowires from top and cross-sectional views. (E and G) SEM images of the microstructured/nanostructured superhydrophobic SiO2 surface and the superhydrophobic CuO surface with nanoneedles. (B1, D1, F1, and H1) The impacting water drop makes a big splash on superhydrophobic surfaces. (B2, D2, F2, and H2) The receding splash is greatly inhibited by 1% AOT on these superhydrophobic surfaces. The impact velocity of each impacting drop is 2.53 ± 0.11 m s−1.