Tie Zhou, Lin Wei, Yanru Xie, Qinghao Li, Guoxiang Hu, Yanxue Chen*, Shishen Yan, Guolei Liu, Liangmo Mei and Jun Jiao
* Corresponding author: Yanxue Chen cyx@sdu.edu.cn
Nanoscale Research Letters 2012, 7:661 doi:10.1186/1556-276X-7-661
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