Gyu-bong Cho, Jung-pil Noh, Ho-jin Sung, Sang-hun Lee, Yeon-min Im, Hyo-jun Ahn and Ki-won Kim*
* Corresponding author: Ki-won Kim kiwonkim@gnu.ac.kr
Nanoscale Research Letters 2012, 7:20 doi:10.1186/1556-276X-7-20
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