[Fan, Jincheng; Fu, Hao; Li, Yanhao; Zhang, Junsen; Gong, Li] Changsha Univ Sci & Technol, Sch Mat Sci & Engn, Changsha 410114, Peoples R China.
[He, Haiping; Fang, Zhishan] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China.
[Zhou, Conghua] Cent South Univ, Sch Phys & Elect, Hunan Key Lab Super Microstruct & Ultrafast Proc, Changsha 410083, Peoples R China.
[Chen, Jianlin] Changsha Univ Sci & Technol, Sch Energy & Power Engn, Changsha 410114, Peoples R China.