Researchers have developed a self-cleaning nano-coating and used this coating to paint on the surface of the car
that motorists do not need to wash the car every day. In the process of drying and forming a film, this coating will form a concave-convex morphology and build a hydrophobic layer (to prevent leakage). In this way, the dust particles can only hang up in the air on the surface of the coating, and eventually be taken away under the scouring of wind and rain. The researchers said that this design comes from the principle of self-purification on the surface of the lotus leaf.
Smooth blades make dust particles nowhere to stand.