1. Department of Synthesis and Characterization of Polymers; Polymer Institute of SAS; Dúbravská cesta 9 845 41 Bratislava Slovakia
2. Department of Nuclear Physics; Institute of Physics of SAS; Dúbravská cesta 9 845 11 Bratislava Slovakia
3. Department of Metal Physics; Institute of Physics of SAS; Dúbravská cesta 9 845 11 Bratislava Slovakia
4. Institute of Materials Science and Technology; TU Wien; Getreidemarkt 9/308 1060 Vienna Austria
5. Institute of Applied Synthetic Chemistry; TU Wien and Christian-Doppler-Laboratory for Photopolymers in Digital and Restorative Dentistry; Getreidemarkt 9/163 MC 1060 Vienna Austria