Figure 4From: Facile synthesis of superhydrophobic surface of ZnO nanoflakes: chemical coating and UV-induced wettability conversionPhotographs of water droplet and contact angles of various buffered droplet. (a) Photographs of a water droplet before and after chemisorption of SA molecules on the surface of ZnO nanoflakes, (b) contact angles of various buffered droplet (black squaresdenote the average CA values).Back to article page