Abstract: A method for altering the surface structure of ultra-disperse particles to allow predetermined interactions to take place in biological media. In a preferred embodiment of the invention, an ultra-disperse particle is subjected to particle modification, allowing the building of structures on the surface of a basically spherical particle so as to direct its interactions. The inventive method allows the building of protrusions of different shapes and different branching patterns, bonding of different chemicals and changing of electronic structure of the surface on the basically spherical particle. Particle modification enables the formation of layers allowing sequential actions to be performed by the particle, or modification can create more than one type of interactive surface on each particle allowing different interactions to occur simultaneously. These modified particles have applications, for example, as pharmaceuticals, cosmetics, preservatives, and in many other fields.

Abstract: A material consists of an electrically conducting support and a dielectric layer containing in % by weight: 17-80 of a polymeric binder and 20-83 of a finely divided mixed pyrogenic silicon and titanium oxide containing between 10 and 50% by weight of titanium.