Xiaojian Tan, Huijun Liu*, Yanwei Wen, Hongyan Lv, Lu Pan, Jing Shi* and Xinfeng Tang
* Corresponding authors: Huijun Liu phlhj@whu.edu.cn - Jing Shi jshi@whu.edu.cn
Nanoscale Research Letters 2012, 7:116 doi:10.1186/1556-276X-7-116