1. Département
de Physique, Faculté des Sciences, Université Libre de Bruxelles CP223, Campus de la Plaine, 1050 Brussels, Belgium
2. Laboratoire
de Chimie des Polymères, Faculté des Sciences, Université Libre de Bruxelles CP206/01, Campus de la Plaine, 1050 Brussels, Belgium
3. Department
of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral
Street, Glasgow G1 1XL, Scotland
4. Institute
of Solid State Physics, Graz University of Technology, Petersgasse
16, 8010 Graz, Austria
5. Institute
of Pharmaceutical Sciences, Department of Pharmaceutical Technology, Karl-Franzens Universität Graz, Universitätsplatz 1, 8010 Graz, Austria