1. Regional Centre of Advanced Technologies and Materials, Department of Physical Chemistry, Faculty of Science, Palacky University, tr. 17 listopadu 12, 771 46 Olomouc, Czech Republic
2. Department of Chemistry, Single Molecule Analysis Group, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109-1055, United States
3. Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 612 65 Brno, Czech Republic
4. Central European Institute of Technology (CEITEC), Masaryk University, Brno, Czech Republic