1. University of Bordeaux, LCPO UMR 5629, 16 avenue Pey Berland, F-33600 Pessac, France
2. CNRS, Laboratoire de Chimie des Polymères
Organiques,
UMR 5629, F-33600, Pessac, France
3. Centro
de Química-Física Molecular and Institute of Nanoscience
and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
4. Institut
Charles Sadron, UPR 22 CNRS, Université de Strasbourg, 23 rue
du Loess, 67034 Strasbourg, France
5. Laboratoire
Léon Brillouin, UMR12 CEA-CNRS, CEA Saclay, F-91191 Gif-sur-Yvette Cedex, France