Xiuli Zhou, Wei Guo, Alejandro G Perez-Bergquist, Qiangmin Wei, Yanbin Chen, Kai Sun* and Lumin Wang*
* Corresponding authors: Kai Sun kaisun@umich.edu - Lumin Wang lmwang@umich.edu
Nanoscale Res Lett 2011, 6:6 doi:10.1007/s11671-010-9739-2