Hongbo Chen, Yi Zheng, Ge Tian, Yan Tian, Xiaowei Zeng, Gan Liu, Kexin Liu, Lei Li, Zhen Li, Lin Mei* and Laiqiang Huang*
* Corresponding authors: Lin Mei mei.lin@sz.tsinghua.edu.cn - Laiqiang Huang huanglq@sz.tsinghua.edu.cn
Nanoscale Res Lett 2011, 6:4 doi:10.1007/s11671-010-9741-8