Eunsoo Choi*, Tae-hyun Nam, Young-Soo Chung, Yeon-Wook Kim and Seung-yong Lee
* Corresponding author: Eunsoo Choi eunsoochoi@hongik.ac.kr
Nanoscale Research Letters 2012, 7:66 doi:10.1186/1556-276X-7-66
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