1. Departments of Biomaterials and Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
2. Pharmaceutical Technology, Faculty of Medicine, University of Leipzig, Eilenburger Str. 15a, 04317 Leipzig, Germany
3. European Synchrotron Radiation Facility, 71, avenue des Martyrs, CS 40220, 38043 Grenoble Cedex 9, France
4. Department of Physics, TU Darmstadt, Hochschulstr. 8, 64289 Darmstadt, Germany