1. Laboratoire de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles (ULB), CP 206/1, Boulevard du Triomphe, 1050 Bruxelles, Belgium
2. Institute of Solid State Physics, University of Technology Graz, Petersgasse 16, 8010 Graz, Austria
3. Laboratory for Chemistry of Novel Materials, Materials Research Institute, University of Mons, Place du Parc 20, 7000 Mons, Belgium
4. Department for Pharmaceutical Technology and Biopharmacy, Institute Pharmaceutical Sciences, Graz University, Universitätsplatz 1, 8010 Graz, Austria
5. International Solvay Institutes of Physics and Chemistry, 1050 Brussels, Belgium