1. Department of Materials and Environmental Chemistry Stockholm University Svante Arrhenius väg 16 C 10691 Stockholm Sweden
2. Inorganic Chemistry Bergische Universität Wuppertal Gaußstraße 20 42119 Wuppertal Germany
3. AC2T research GmbH Viktor-Kaplan-Str. 2/c 2700 Wiener Neustadt Austria