– Leibniz Institute of Polymer Research, Dresden, Germany (Novel materials formed by self-assembly of synthetic and / or natural polyelectrolytes, Characterization of new nanostructured architectures formed by crystallization of CaCO3 in the presence of synthetic and / or natural polyelectrolytes, New polymorphic structures CaCO3/polyanion as a template for the core/shell particles, Electrokinetic and morphological characterization of CaCO3 / polyanion microparticles, Studies on adsorption capacity of calcium carbonate microparticles)
– Institute of Polymers, Sofia, Bulgaria (New polymeric complex systems based on ionic polymers, synthetic and natural)
– Institute of Theoretical Chemistry and Physical Chemistry of National Hellenic Research Foundation, Athens, Greece (Calcium carbonate crystals growth controlled by block copolymers).