Shaohua Shen, Xiaobo Chen, Feng Ren, Coleman X Kronawitter, Samuel S Mao* and Liejin Guo*
* Corresponding authors: Samuel S Mao ssmao@lbl.gov - Liejin Guo lj-guo@mail.xjtu.edu.cn
Nanoscale Research Letters 2011, 6:290 doi:10.1186/1556-276X-6-290
Fields marked * are required