Sannian Song*, Zhitang Song, Cheng Peng, Lina Gao, Yifeng Gu, Zhonghua Zhang, Yegang Lv, Dongning Yao, Liangcai Wu and Bo Liu
* Corresponding author: Sannian Song songsannian@mail.sim.ac.cn
Nanoscale Research Letters 2013, 8:77 doi:10.1186/1556-276X-8-77
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