[Zhao, Xu; Li, Shaozhen; Liu, Yi] Wuhan Polytech Univ, Sch Elect & Elect Engn, Wuhan 430023, Hubei, Peoples R China.
[Xu, Lisha] Hubei Univ, Sch Phys Educ, Wuhan 430062, Peoples R China.
[Mei, Yunjun] Wuhan Polytech Univ, Sch Chem & Environm Engn, Wuhan 430023, Hubei, Peoples R China.
[Chen, Luocheng] Hubei Sino Australian Nano Mat Technol Co Ltd, Guangshui 432700, Peoples R China.
[Yin, Kuibo; Zheng, Anqi] Southeast Univ, SEU FEI Nanopico Ctr, Key Lab MEMS, Minist Educ, Nanjing 210096, Peoples R China.