Fabrication and Characterization of Stable Super Hydrophobic Cupric Oxide Films

Cupric oxide films with a new hierarchical architecture consisting of nanowires and nanoflowers were fabricated on copper substrate via an oxidation-dehydration process.Stable superhydrophobic CuO surface was obtained by modifing CuO films with perfluorooctyltrichlorosilane.The surface morphology and composition were studied using scanning electron microscopy (SEM),X-ray diffraction (XRD),and X-ray photoelectron spectroscopy (XPS),respectively.The results show that the modified CuO films exhibited the superhydrophobicity with a water contact angle (CA) of about 156.3°,as well as a small sliding angle (SA) of about 2°.The special hierarchical structure,along with the low surface energy leads to high superhydrophobicity of the surface.