Rungang Gao, Nantao Hu, Zhi Yang*, Qirong Zhu, Jing Chai, Yanjie Su, Liying Zhang and Yafei Zhang*
* Corresponding authors: Zhi Yang zhiyang@sjtu.edu.cn - Yafei Zhang yfzhang@sjtu.edu.cn
Nanoscale Research Letters 2013, 8:32 doi:10.1186/1556-276X-8-32
Fields marked * are required