1. Department of Chemistry University of Bergen, P.O.box 7803 5020 Bergen Norway
2. Department of Condensed Matter Physics and Microelecetronics The University of Sofia J. Bourchier str. 5 1164 Sofia Bulgaria
3. SINTEF Industry, P.O.box 124 Blindern 0314 Oslo Norway
4. Department of Energy Conversion and Storage Technical University of Denmark Fysikvej 2800 Kgs. Lyngby Denmark
5. Department of Chemistry University of Oslo, P.O.box 1033 Blindern 0313 Oslo Norway