1. Department
of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská Dolina, Ilkovičova 6, 842 15 Bratislava, Slovakia
2. Department
of Nuclear Physics and Biophysics, Faculty of Mathematics, Physics
and Informatics, Comenius University, Mlynská Dolina, 84248 Bratislava, Slovakia
3. Advanced
Technologies Research Institute, Faculty of Materials Science and
Technology in Trnava, Slovak University of Technology in Bratislava, Bottova 25, 917 24 Trnava, Slovakia