1. Laser Zentrum Hannover e.V., Hollerithallee 8, D-30419 Hannover, Germany
2. University of Ghent, Polymer Chemistry & Biomaterials Research Group, Krijgslaan 281, 9000 Ghent, Belgium
3. Institute of Organic Chemistry, Leibniz University of Hannover, Schneiderberg 1B, 30167 Hannover, Germany