Chuyang Chen, Xudong Sun*, Xuchuan Jiang, Dun Niu, Aibing Yu, Zhigang Liu and JiGuang Li
* Corresponding author: Xudong Sun xdsun@mail.neu.edu.cn
Nanoscale Research Letters 2009, 4:971-976 doi:10.1007/s11671-009-9343-5
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