Chen, Zhi-xiang
Li, Zhao-lin
Cao, Shan
Wang, Fang
Zhou, Jie
Funding for this research was provided by:
National Natural Science Foundation of China (61225008, 61373074, 61373090)
National Basic Research Program (973) of China (2014CB349304)
Specialized Research Fund for the Doctoral Program of Higher Education, the Ministry of Education of China (20120002110033)
Tsinghua University Initiative Scientific Research Program