1. Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 1999/2, 182 21 Prague 8, Czech Republic
2. University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic, Tel.: +420 266 052 565
3. University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6, Czech Republic