The superhydrophobicity and the strong solid-liquid adhesion of the dually structured ZnO surface are attributed to the suitable size of microstructure and nanostructure. This phenomenon, so different from the Lotus effect, can be called the Petal effect— the super hydrophobicity and the enhanced solid-liquid adhesion coexist on the same surface. The Cassie impregnating model was proposed to understand the underlying reason.
zheng, liqiu Dr. and Kwaichow B., Chan
"Enhanced adhesion of superhydrophobic ZnO surface,"
Georgia Journal of Science, Vol. 74, No. 2, Article 10.
Available at: http://digitalcommons.gaacademy.org/gjs/vol74/iss2/10