Figure 9
(a) Schematic of an experimental setup to avoid droplet evaporation as suggested by Drelich23. (b) Contact angle of hydrophilic and hydrophobic samples before and after 15 min of exposure in setup (a). The experiments were repeated on three samples for the hydrophobic wetting condition with five droplets each and on four samples for the hydrophilic wetting condition as some samples could only fit four droplets due to the enhanced spreading. The reference data for normalization is “before”. For both wetting types a separate normalization was carried out.
