1. Institut für Physik, Humboldt-Universität zu Berlin, Berlin, Germany
2. Institute of Solid State Physics, Graz University of Technology, Graz, Austria
3. Helmholtz Zentrum Berlin für Materialien und Energie, BESSY II, Berlin, Germany
4. Fachbereich Physik, Molekulare Festkörperphysik, Philipps-Universität Marburg, Marburg, Germany
5. Max Planck Institute for Polymer Research, Mainz, Germany
6. Department Materials Physics, University of Leoben, Leoben, Austria
7. Dipartimento di Chimica Fisica e Inorganica and INSTM-UdR, Università di Bologna, Bologna, Italy
8. Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, China