1. School of Materials Science and Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
2. State Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, China
3. TUM School of Natural Science, Department of Physics, Chair for Functional Materials, Technical University of Munich, 85748 Garching, Germany
4. Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
5. Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, P. R. China
6. Department of Chemistry, Korea University, Seoul 02841, Republic of Korea
7. School of Mechanics and Safety Engineering Science, Zhengzhou University, Zhengzhou 450001, China
8. Heinz Maier-Leibnitz Zentrum (MLZ), Technical University of Munich, 85748 Garching, Germany
9. Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56-58, SE-100 44 Stockholm, Sweden