1. Laboratory for Tribology and Interface Nanotechnology, Faculty of Mechanical Engineering; University of Ljubljana; Bogišičeva 8 Ljubljana 1000 Slovenia
2. Department for Nanostructured Materials; Jožef Stefan Institute; Jamova cesta 39 Ljubljana 1000 Slovenia
3. Laboratory for Polymer Chemistry and Technology; National Institute of Chemistry Slovenia; Hajdrihova 19 Ljubljana 1001 Slovenia