1. Energy and Semiconductor Research LaboratoryInstitute of PhysicsUniversity of Oldenburg Carl‐von‐Ossietzky‐Str. 9‐11 D‐26129 Oldenburg Germany
2. Institute for Biology and Environmental SciencesUniversity of Oldenburg Carl‐von Ossietzky‐Str. 9‐11 D‐26129 Oldenburg Germany
3. Mads Clausen InstituteUniversity of Southern Denmark Alsion 2 DK‐6400 Sønderborg Denmark
4. Kekulé Institute of Organic Chemistry and BiochemistryUniversity of Bonn Gerhard‐Domagk‐Str. 1 D‐53121 Bonn Germany