1. School of Chemistry and Chemical Engineering, Southeast University, No. 2 Dongnandaxue Road, Nanjing, Jiangsu 211189, P. R. China
2. China Tobacco Jiangsu Industrial Co., Ltd., No. 29 Xinglong Road, Nanjing, Jiangsu 210019, P. R. China
3. School of Physics, Southeast University, No. 2 Dongnandaxue Road, Nanjing, Jiangsu 211189, P. R. China
4. Key Laboratory of Bio-Based Material Science and Technology, Ministry of Education, Northeast Forestry University, No.26 Hexing Road, Harbin 150040, P. R. China