1. Institute of Electrical Engineering, Slovak Academy of Sciences, 9 Dubravska cesta, Bratislava 841 04, Slovakia
2. Institute of Physics, Slovak Academy of Sciences, 5807/9 Dubravska cesta, Bratislava 845 11, Slovakia
3. Centre for Advanced Materials Application CEMEA, Slovak Academy of Sciences, 5807/9 Dubravska cesta, Bratislava 845 11, Slovakia
4. Danubia NanoTech, s.r.o., 2961/3 Ilkovicova, Bratislava 841 04, Slovakia
5. Department of Physics of Nanostructured Materials, University of Vienna, 5 Boltzmanngasse, Vienna A-1090, Austria
6. Polymer Institute, Slovak Academy of Sciences, 9 Dubravska cesta, Bratislava 845 41, Slovakia
7. Vinca Institute of Nuclear Sciences, 12-14 Mike Alasa, Vinca, 11351 Belgrade, Serbia