1. Nanobiotechnology Department, Brandenburg University of Technology Cottbus─Senftenberg, University Square 1, 01968 Senftenberg, Germany
2. SSI “Institute for Single Crystals” of the National Academy of Sciences of Ukraine, 60 Nauky Avenue, 61072 Kharkiv, Ukraine
3. V.N. Karazin Kharkiv National University, 4 Svobody Sq., Kharkiv, 61022 Kharkiv, Ukraine
4. Technical University of Liberec, Studentská 1402/2, 461 17 Liberec 1, Czech Republic