Coating materials containing gold nanoparticles

Highly concentrated pastes of gold nanoparticles were successfully produced by using a special type of protective polymer and a mild reductant The solid part of these pastes comprises up to 85wt% of gold nanoparticles, 10 similar to 30 nm in diameter and a residual protective polymer. This component can be diluted at arbitrary rates with any type of solvent by selecting the polarity of the protective polymer. Electronics, optics, catalysis, colourants and surface metal coatings are the possible fields of application of these pastes.