[1] Yonsei Univ, Coll Life Sci & Biotechnol, Dept Biotechnol, 50 Yonsei Ro, Seoul 120749, South Korea
[2] Kongju Natl Univ, Div Adv Mat Engn, Chungnam 330717, South Korea
[3] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Taejon 305701, South Korea
[4] Korea Adv Inst Sci & Technol, Graphene Res Ctr KI NanoCentury, Taejon 305701, South Korea
[5] Yonsei Univ, Coll Med, Dept Neurosurg, Seoul 120752, South Korea