1. Department of Chemistry, Johannes Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany
2. Department of Physics, University of Ioannina, P.O. Box 1186, 45110 Ioannina, Greece
3. PSS Polymer Standards Service GmbH, In der Dalheimer Wiese 5, 55120 Mainz, Germany
4. Max Planck Institute for Polymer Research, 55129 Mainz, Germany
5. Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), 45110 Ioannina, Greece