1. Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
2. Experimental
Physics VI, Faculty of Physics and Astronomy, Julius-Maximilian-University of Würzburg, Am Hubland, 97074 Würzburg, Germany
3. Bavarian Center of Applied Energy Research e.V. (ZAE Bayern), Am Hubland, 97074 Würzburg, Germany