Patent ID: 8808579

Claim:
A method for producing a dispersion of nanoparticles having an essentially oxide-free surface in an aqueous phase with the following steps: a) providing at least one, two-phase system comprising a first liquid phase, referred to as start phase, which is chosen such that nanoparticles having an at least partially oxidic surface can be dispersed and having a second liquid phase, referred to as target phase, which is not miscible with the start phase and is chosen such that nanoparticles having an essentially oxide-free surface can be dispersed, b) adding nanoparticles having an at least partially present oxidic surface, which disperse, as a function of the oxidation state of the surface in the start phase and/or the start- and target phase, c) adding a reducing agent which dissolves in the start phase so that the nanoparticles having an at least partially oxidic surface disperse after reduction in the target phase, the sequence of steps a), b), and c) being able to be chosen arbitrarily.