Icpyo Kim, Tae-Hyun Nam, Ki-Won Kim, Jou-Hyeon Ahn, Dong-Soo Park, Cheolwoo Ahn, Byong S Chun, Guoxiu Wang and Hyo-Jun Ahn*
* Corresponding author: Hyo-Jun Ahn ahj@gnu.ac.kr
Nanoscale Research Letters 2012, 7:64 doi:10.1186/1556-276X-7-64