Yun Ding, Liang-Bo Liang, Min Li, Ding-Fei He, Liang Xu, Pan Wang and Xue-Feng Yu*
* Corresponding author: Xue-Feng Yu yxf@whu.edu.cn
Nanoscale Research Letters 2011, 6:119 doi:10.1186/1556-276X-6-119
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