1. Departments of Chemistry and Materials Science & Technology, University of Crete and FORTH, P.O Box 71110, Heraklion, Greece
2. Department of Materials Science and Engineering, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, Pennsylvania 15213, United States
3. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
4. Laboratoire Ondes et Milieux Complexes FRE CNRS 3102, Université du Havre, Place R. Schuman, 76610 Le Havre, France
5. Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States.