Lian-Jie Li, Bao Zhu, Shi-Jin Ding*, Hong-Liang Lu, Qing-Qing Sun, Anquan Jiang, David Wei Zhang and Chunxiang Zhu
* Corresponding author: Shi-Jin Ding sjding@fudan.edu.cn
Nanoscale Research Letters 2012, 7:544 doi:10.1186/1556-276X-7-544
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