1. State Key Laboratory of Heavy Oil Processing and Beijing Key Lab of Oil & Gas optical detection technology China University of Petroleum, Beijing 18 Fuxue Road, Changping District Beijing 102249 China
2. Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences 1219 Zhongguan West Road Ningbo 315201 China
3. Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 19 A Yuquan Road, Shijingshan District Beijing 100049 China