1. Nano Carbon Materials Research
Group, Korea Electrotechnology Research Institute (KERI), 12 Bulmosan-ro 10 beon-gil, Changwon, Gyeongsangnam-do 642-120,
Republic of Korea
2. Department of Energy and Materials
Engineering, Dongguk University, 26 Pil-dong,
3-ga, Jung-gu, Seoul 100-715, Republic of Korea