1. School of Optoelectronic Science and Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu 610054, P. R. China
2. Chengdu University of Traditional Chinese Medicine, State Key Laboratory Southwestern Chinese Medicine Resources, Chengdu 611137, P. R. China
3. Department of Physical Chemistry, University of Málaga, Campus de Teatinos s/n, Málaga 29071, Spain
4. The Experimental High School Attached to UESTC, Chengdu 611730, P. R. China
5. Analytical & Testing Centre, Sichuan University, Chengdu 610064, P. R. China