1. Institute of Nanostructured Materials & Tianjin Key Laboratory of Fiber Modification and Functional Fiber, School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, P. R. China
2. Faculty
of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
3. State
Key Laboratory of Luminescence and Applications, Changchun Institute
of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, P. R. China