A superhydrophobic Culimg="/entities/sbnd" src="/sd/grey_pxl.gif" class="glyphImg imgLazyJSB">Zn coating with dandelion-like CuO film was obtained on steel surface.
The dual-scale model composed of sphere and pillar was used to theoretical analysis.
The wetting state between water droplet and this coating was the stable Cassie-Cassie state.