Sungho Woo*, Jae H Jeong, Hong K Lyu, Yoon S Han and Youngkyoo Kim*
* Corresponding authors: Sungho Woo shwoo@dgist.ac.kr - Youngkyoo Kim ykimm@knu.ac.kr
Nanoscale Research Letters 2012, 7:641 doi:10.1186/1556-276X-7-641