Kyuwan Song, Bonggi Kim, Hoongjoo Lee, Youn-Jung Lee, Cheolmin Park, Nagarajan Balaji, Minkyu Ju, Jaewoo Choi and Junsin Yi*
* Corresponding author: Junsin Yi yi@yurim.skku.ac.kr
Nanoscale Research Letters 2012, 7:410 doi:10.1186/1556-276X-7-410