1. ISIS UMR 7006 Université de Strasbourg CNRS 8 Allée Gaspard Monge Strasbourg 67000 France
2. Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany
3. Max Planck Institute for Mathematics in the Sciences Inselstraße 22 04103 Leipzig Germany
4. School of Physics Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) and Advanced Materials and Bioengineering Research (AMBER) Trinity College Dublin Dublin 2 D02 K8N4 Ireland
5. Laboratory for Chemistry of Novel Materials Université de Mons Place du Parc 20 7000 Mons Belgium
6. Department of Physics University of Salerno Via Giovanni Paolo II 132 84084 Fisciano (SA) Italy