[Sun, Qijun; Guo, Wenbin; Cong, Zifeng; Guo, Zihao; Lei, Yanqiang; Yu, Jinran; Pu, Xiong] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 101400, Peoples R China.
[Xu, Zhizhao; Jia, Chuankun] Changsha Univ Sci & Technol, Coll Mat Sci & Engn, Changsha 410114, Peoples R China.
[Sun, Jia] Cent South Univ, Sch Phys & Elect, Changsha 410083, Peoples R China.
[Sun, Qijun; Pu, Xiong] Univ Chinese Acad Sci, Sch Nanosci & Technol, Beijing 100049, Peoples R China.
[Sun, Qijun; Pu, Xiong] Guangxi Univ, Ctr Nanoenergy Res, Sch Phys Sci & Technol, Nanning 530004, Peoples R China.