Fig. 8

Measured contact angle of DI water as a function of time after surface treatment for different surfaces (ripples, spikes) obtained from laser texturing and plasma coating of a thin (d = 130 nm) or thick (d = 1070 nm) layer of PP. The insets to the right of the plot show exemplary images of the water droplets on the surface and the corresponding contact angle. The contact angle area of a superhydrophobic state (θ > 150°) is indicated in green.