1. Empa, Swiss Federal Laboratories for Materials Science & Technology, Laboratory for Advanced Fibers, Lerchenfeldstrasse 5, 9014 St.Gallen, Switzerland
2. Charles University in Prague, Faculty of Mathematics and Physics, Department of Physics of Materials, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
3. Charles University in Prague, Faculty of Mathematics and Physics, Department of Macromolecular Physics, V Holešovičkách 2, 180 00 Prague 8, Czech Republic