1. Division of Advanced Materials, Korea Research Institute of Chemical Technology, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea
2. Graphene Research Team, ICT Creative Research Laboratory, Electronics and Telecommunications Research Institute (ETRI), 218 Gajeong-ro,
Yuseong-gu, Daejeon 34129, Republic of Korea
3. Department of Advanced Materials and Chemical Engineering, Hannam University, Daejeon 34430, Republic of Korea