Jae I Kim, Jongmin Kim, Junhee Lee, Dae-Ryong Jung, Hoechang Kim, Hongsik Choi, Sungjun Lee, Sujin Byun, Suji Kang and Byungwoo Park*
* Corresponding author: Byungwoo Park byungwoo@snu.ac.kr
Nanoscale Research Letters 2012, 7:482 doi:10.1186/1556-276X-7-482