Ting Shang, Cai-ding Wang, Lei Ren*, Xin-hua Tian*, Dong-hui Li, Xue-bin Ke, Min Chen and An-qi Yang
* Corresponding authors: Lei Ren renlei@xmu.edu.cn - Xin-hua Tian txhmd@163.com
Nanoscale Research Letters 2013, 8:4 doi:10.1186/1556-276X-8-4