1. School of Chemistry and Material Science, University of Science and Technology of China, 230026 Hefei , China
2. Deutsches Elektronen-Synchrotron, 22607 Hamburg, Germany
3. Department of Engineering Mechanics, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
4. Wallenberg Wood Science Center, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden
5. Lehrstuhl für Funktionelle Materialien, Physik Department, Technische Universität München, 85748 Garching, Germany
6. Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology (KIT), 76021 Karlsruhe, Germany
7. School of Material Science and Engineering, PCFM lab, Sun Yat-sen University, 510275 Guangzhou, China
8. Heinz Maier Leibniz Zentrum (MLZ), Technische Universität München, 85748 Garching, Germany
9. Fibre and Polymer Technology, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden