Zhaolong Yang, Daqiang Gao, Zhonghua Zhu, Jing Zhang, Zhenhua Shi, Zhipeng Zhang and Desheng Xue*
* Corresponding author: Desheng Xue xueds@lzu.edu.cn
Nanoscale Research Letters 2013, 8:17 doi:10.1186/1556-276X-8-17
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