1. Faculty for Mechanical Engineering, Laboratory of Experimental Mechanics, University of Ljubljana, Aškerčeva ulica 6, Ljubljana 1000, Slovenia
2. Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Jamova ulica 39, Ljubljana 1000, Slovenia
3. Department of Polymer Chemistry and Technology, National Institute of Chemistry, Hajdrihova ulica 19, Ljubljana 1000, Slovenia