1. Department of Mechanical and Process Engineering (D-MAVT); Swiss Federal Institute of Technology (ETH); 8092 Zürich Switzerland
2. Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; Heyrovsky sq. 2 162 06 Prague 6 Czech Republic
3. Solid State Physics Department; School of Physics; Aristotle University of Thessaloniki; Thessaloniki 541424 Greece
4. Laboratory of Polymer Chemistry and Technology; Department of Chemistry; Aristotle University of Thessaloniki; Thessaloniki 541424 Greece