Tongxiang Cui, Ruitao Lv*, Zheng-Hong Huang, Hongwei Zhu, Yi Jia, Shuxiao Chen, Kunlin Wang, Dehai Wu and Feiyu Kang*
* Corresponding authors: Ruitao Lv rxl40@psu.edu - Feiyu Kang fykang@tsinghua.edu.cn
Nanoscale Research Letters 2012, 7:453 doi:10.1186/1556-276X-7-453
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