1. State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Changchun, Jilin 130022, China
2. Institute
of Chemical and Environment Engineering, West Pomeranian University of Technology, Szczecin ul. Pulaskiego 10, 70-322 Szczecin, Poland
3. IBS
Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Daejon 305-701, Republic of Korea
4. Department
of Energy Science, Department of Physics, Sungkyunkwan University, Suwon 440-746, Republic of Korea
5. Department
of Physics and Materials Science, City University of Hong Kong, Tat Chee
Avenue, Kowloon, Hong
Kong, China