Figure 4.

(a–d) High-speed camera footage of the lifted liquid sheet after impact (with t = 0 s, the moment of droplet impact). (e) Averaged measured wedge angle α (green circles) as a function of time on stainless steel. The error bar is given by the SD. The black dotted line is the best linear fit of wedge angle measurements. The vertical red lines depict the different stages of liquid sheet spreading as given in (a–d): the emergence of the liquid sheet from the droplet (a), radial expansion (b), formation of liquid fingers at the front of the liquid (c), and droplet detachment (d).