1. Makromolekulare Chemie II and Bayreuther Zentrum für Kolloide und Grenzflächen, Universität Bayreuth, Universitätsstrasse 30, D-95440 Bayreuth, Germany
2. Department of Applied Physics, Helsinki University of Technology, FIN-02015 TKK, Helsinki, Finland
3. Department of Polymer Science, School of Chemistry, Moscow State University, Vorob’evy Gory, 119991 Moscow, Russia