Nanotechnology is considered the most promising technology area of the world. It is less of a technology but more an umbrella term for a multitude of applications and products. These contain smallest particles and have very special properties. TitanShield® uses the properties of photocatalytic Titanium dioxide. This technology is not new but new and improved production processes, smaller particle sizes and doping with noble metals result today in applications that were regarded as utopia a short time ago.