Polyelectrolytes, i. e., water-soluble polymers with a lot of dissociating functional groups, and nanoparticles, i. e., ?ne particles with diameters on the nanometer scale, are two substance classes of growing interest. Both polyelectrolytes and nanoparticles can be found in many industrial applications such as in paints, - per coatings, cosmetics, and pharmaceuticals. For adjusting the properties of such multicomponent systems, the knowledge of the macromolecular and electroch- ical features of the polyelectrolytes on the one hand, and the size and shape of the nanoparticles on the other...