1. Polymer Institute of SAS, Dúbravská cesta 9, SK-845 41 Bratislava, Slovakia
2. Institute of Physics of SAS, Dúbravská cesta 9, SK-845 11 Bratislava, Slovakia
3. Department of Nuclear Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina Ilkovičova 6, SK-842 15 Bratislava, Slovakia
4. Institute of Macromolecular Chemistry of CAS, Heyrovského Square 2, CZ-162 06 Prague, Czech Republic