1. Erich Schmid Institute of Materials Science, Austrian Academy of Sciences, Jahnstrasse 12, 8700 Leoben, Austria
2. Department of Materials Science, Montanuniversitaet Leoben, Franz-Josef-Strasse 18, 8700 Leoben, Austria
3. Helmholtz-Zentrum Berlin für Materialien und Energie (HZB), Albert-Einstein-Str. 15, 12489 Berlin, Germany
4. Institute of Chemistry of Polymeric Materials, Montanuniversitaet Leoben, Otto-Gloeckel-Straße 2, 8700 Leoben, Austria