Qiping Shi, Simin Luo, Haiying Jia, Lie Feng, Xiaohua Lu, Lixin Zhou and Jiye Cai*
* Corresponding author: Jiye Cai tjycai@jnu.edu.cn
Nanoscale Research Letters 2013, 8:90 doi:10.1186/1556-276X-8-90
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