1. Department of Chemistry, Centre for Materials Science and Nanotechnology (SMN), University of Oslo, Oslo 0371, Norway
2. MAX IV Laboratory, Lund University, SE-221 00 Lund, Sweden
3. Nano and Molecular Systems Research Unit, University of Oulu, FI-90014 Oulu, Finland
4. Environmental and Chemical Engineering Research Unit, University of Oulu, FI-90014 Oulu, Finland
5. Department of Physics, Lund University, SE-221 00 Lund, Sweden
6. Department of Chemistry, University of Helsinki, FI-00014 Helsinki, Finland