1. Institute of Silicate Materials; Riga Technical University; Azenes 14/24 Riga LV-1048 Latvia
2. Institute of Physics; University of Tartu; Riia 142 Tartu 51014 Estonia
3. Institute of Technical Physics; Riga Technical University; Azenes 14/24 Riga LV-1048 Latvia
4. Estonian Nanotechnology Competence Center; Riia 142 Tartu 51014 Estonia
5. Institute of Textile Materials Technologies and Design; Riga Technical University; Azenes 16/20 Riga LV-1048 Latvia