1. College of Physics and Laboratory of Fiber Materials and Modern Textile, Growing Base for State Key Laboratory, Qingdao University
2. Qingdao
3. P. R. China
4. Institute of Theoretical Chemistry, Jilin University, Changchun
5. Jilin 130021
6. Ames Laboratory-U.S. DOE and Department of Physics and Astronomy, Iowa State University
7. Ames
8. USA