1. Laboratory of Polymer Chemistry and Technology, Department of Chemistry, Aristotle University of Thessaloniki, 541 24, Thessaloniki, Macedonia, Greece
2. Solid State
Physics Section, Physics Department, Aristotle University of Thessaloniki, 541 24 Thessaloniki, Greece
3. Institute of Biomaterials, Department of Materials Science
and Engineering, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany
4. Institute
of Polymer Materials, Department of Materials Science
and Engineering, University of Erlangen-Nuremberg, Martenstrasse 7, 91058 Erlangen, Germany