Peng Xiang, Xiong Li, Heng Wang, Guanghui Liu, Ting Shu, Ziming Zhou, Zhiliang Ku, Yaoguang Rong, Mi Xu, Linfeng Liu, Min Hu, Ying Yang, Wei Chen, Tongfa Liu, Meili Zhang and Hongwei Han*
* Corresponding author: Hongwei Han hongwei.han@mail.hust.edu.cn
Nanoscale Research Letters 2011, 6:606 doi:10.1186/1556-276X-6-606