1. School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China
2. Wood Technology and Wood Chemistry, Georg-August-Universität Göttingen, Büsgenweg 4, Göttingen D-37077, Germany
3. Key Laboratory of Bio-Based Material Science and Technology (Ministry of Education), College of Material Science and Engineering, Northeast Forestry University, Harbin 150040, Heilongjiang, China
4. Affiliated Hospital
of Southwest Jiaotong University, Chengdu 610031, China
5. Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621999, China