Woojin Lee, Hoechang Kim, Dae-Ryong Jung, Jongmin Kim, Changwoo Nahm, Junhee Lee, Suji Kang, Byungho Lee and Byungwoo Park*
* Corresponding author: Byungwoo Park byungwoo@snu.ac.kr
Nanoscale Research Letters 2012, 7:672 doi:10.1186/1556-276X-7-672