1. August Chełkowski Institute of Physics, University of Silesia in Katowice, 75 Pułku Piechoty 1, 41-500 Chorzów, Poland
2. Leibniz-Institut für Polymerforschung, Dresden e.V., Hohe Str. 6, 01069 Dresden, Germany
3. Institute of Materials Engineering, University of Silesia, 75 Pułku Piechoty 1a, 41-500 Chorzow, Poland