1. Department of Applied Physics, Aalto University School of Science, FI-00076 Aalto, Finland
2. Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB21EW, U.K.
3. Physical Chemistry and Centre for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, D-45127 Essen, Germany
4. Institut Pluridisciplinaire de Recherche sur l’Environnement les Matériaux UMR 5254 CNRS/UPPA, F-64053 Pau, France
5. Institute of Macromolecular Compounds, Russian Academy of Sciences, 199004 St. Petersburg, Russia
6. St. Petersburg State Polytechnic University, 195251 St. Petersburg, Russia
7. St. Petersburg National University of Informational Technologies, Mechanics and Optics, 197101 St. Petersburg, Russia