1. Institute of Materials and Surface Engineering Faculty of Materials Science and Applied Chemistry Riga Technical University P. Valdena str. 3/7 Riga LV‐1048 Latvia
2. Institute of Technical Physics Faculty of Materials Science and Applied Chemistry Riga Technical University P. Valdena str. 3/7 Riga LV‐1048 Latvia
3. Institute of Solid State Physics University of Latvia Kengaraga str. 8 Riga LV‐1063 Latvia
4. Institute of Polymer Materials Faculty of Materials Science and Applied Chemistry Riga Technical University P. Valdena str. 3/7 Riga LV‐1048 Latvia
5. Department of Chemical Engineering The University of Melbourne Parkville Victoria 3010 Australia