Fan, Jinshi
Duan, Jiaxin
Yu, Ziya
Wu, Daxiong
Zhu, Haitao
Funding for this research was provided by:
the National Natural Science Foundation of China (51172117)
the National Natural Science Foundation of China (51472134)
the Natural Science Foundation of Shandong Province (ZR2010EM035, ZR2013EMM003)
the Foundation of Qingdao Science and Technology (13-1-4-148-jch)