1. Czech Advanced Technology and Research Institute, Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Šlechtitelů 27, 78371 Olomouc, Czech Republic
2. Department of Chemical and Pharmaceutical Sciences, ICCOM-CNR Trieste Research Unit, INSTM-Trieste, Center for Energy, Environment and Transport Giacomo Ciamician, University of Trieste, Via L. Giorgieri 1, 34127 Trieste, Italy
3. Nanotechnology Centre, Centre of Energy and Environmental Technologies, VŠB─Technical University of Ostrava, 17. listopadu 2172/15, Poruba, 708 00 Ostrava, Czech Republic
4. Department of Chemistry and NIS Centre, University of Turin, 10125 Turin, Italy