1. University of Sofia; Department of Physical Chemistry; 1 James Bourchier Boulevard 1164 Sofia Bulgaria
2. Leibniz Institute of Polymer Research; Dresden e.V., Hohe Straße 6 01069 Dresden Germany
3. University of Karlsruhe; Institute of Physical Chemistry; 76131 Karlsruhe Germany
4. Saint-Gobain-Sekurit, Central Research Laboratories (ZAF); Thin-Films Department; Glasstrasse 1 52134 Herzogenrath Germany