Superhydrophobic surface was prepared on the zinc substrate by chemical solution method via immersing clean pure zinc substrate into a water solution of zinc nitrate hexahydrate[Zn(NO3)2·6H2O] and hexamethylenetetraamine(C6H12N4) at 95 °C in water bath for 1.5 h,then modified with 18 alkanethiol.The best resulting surface shows superhydrophobic properties with a water contact angle of about 158° and a low water roll-off angle of around 3°.The prepared samples were characterized by powder X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),energy-dispersive X-ray spectroscopy(EDX),transmission electron microscopy(TEM),and scanning electron microscopy(SEM).SEM images of the films show that the resulting surface exhibits flower-shaped micro-and nano-structure.The surfaces of the prepared films were composed of ZnO nanorods which were wurtzite structure.The special flower-like micro-and nano-structure along with the low surface energy leads to the surface superhydrophobicity.
