Yi Ding*, Yanli Wang*, Jun Ni, Lin Shi, Siqi Shi, Chaorong Li and Weihua Tang
* Corresponding authors: Yi Ding dingyi2001@tsinghua.org.cn - Yanli Wang wangyanli-04@tsinghua.org.cn
Nanoscale Research Letters 2011, 6:190 doi:10.1186/1556-276X-6-190
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