1. SINTEF Industry, P.O. Box 4760
Torgarden, NO-7465 Trondheim, Norway
2. SINTEF Industry, Forskningsveien 1, NO-0373 Oslo, Norway
3. Centre for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, Gaustadalléen 21, NO-0349 Oslo, Norway
4. Centre for Materials Science and Nanotechnology, Semiconductor Physics, Department of Physics, University of Oslo, NO-0349 Oslo, Norway