1. NanoLund, Lund University, P.O. Box 118, SE-22100 Lund, Sweden
2. Division of Solid State Physics, Lund University, P.O. Box 118, SE-22100 Lund, Sweden
3. Department of Cellular & Molecular Medicine, University of California San Diego, 9500 Gilman Dr, La Jolla, California 92093, United States
4. Division of Physical Chemistry, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
5. Department of Chemistry and Biomedical Sciences, Linnaeus University, Norra vägen 49, SE-391 82 Kalmar, Sweden