Self-cleaning of surfaces.
The nanoparticle titanium dioxide (Ti02), thanks to the action of ultraviolet rays from the sun or an artificial light source, can make surfaces "super-hydrophilic". The "superhydrophilicity", which literally means "strong affinity with water", is the property that prevents the surface treated with nanotitanium from being water repellent.
In this way the water particles, present in the atmosphere, due to the effect of humidity, will be distributed on the surface in a homogeneous way, forming a protective film, thin and invisible, which will prevent dirt from settling.
The dirt can be removed naturally by the rain, or by washing with water, without the formation of drops or halos, thus creating a "self-cleaning surface".