Reducing the scale of substances to “nano” allows you to change their chemical and physical properties. The insulator can be changed into a electricity conductor, a colorless substance can get sparkling colors and soft can be modified to ultra-hard. In addition, when changing to the “nano” scale, even such basic properties as the melting point or chemical reactions in which the substance participates change. That’s why nanotechnology allows you to change silver into an effective UV protection filter, soft graphite in carbon nanotubes that increase the hardness of plastic and copper into an effective killer of bacteria and mold.