Hongwei Hu, Jianning Ding*, Shuai Zhang, Yan Li, Li Bai and Ningyi Yuan*
* Corresponding authors: Jianning Ding dingjn@cczu.edu.cn - Ningyi Yuan nyyuan@cczu.edu.cn
Nanoscale Research Letters 2013, 8:10 doi:10.1186/1556-276X-8-10
Fields marked * are required