1. Key
Laboratory of Biobased Materials, Qingdao Institute of Bioenergy and
Bioprocess Technology, Chinese Academy of Sciences, 266101 Qingdao, Shandong, People’s Republic of China
2. University of
Chinese Academy of Sciences, 100049 Beijing, People’s Republic of China
3. College
of Physics, Qingdao University, 266071 Qingdao, Shandong, People’s Republic of China