1. Nanomaterials Physicochemistry Department, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland
2. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
3. Research Center of Nano Science and Technology, Shanghai University, No. 99 Shangda Road, Baoshan District, Shanghai 200444, China
4. Department of Physics, Chemistry and Biology, Linkoping University, SE-58183 Linkoping, Sweden
5. Division of Solid State Electronics, Department of Engineering Sciences, Uppsala University, Uppsala 75237, Sweden
6. Department of Physics and Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, China