1. Graphene Research
Lab, Emerging Devices Research Group, Electronics and Telecommunications Research Institute (ETRI), 218 Gajeongno,
Yuseong-gu, Daejeon 34129, Republic of Korea
2. Thin Film Materials Research Center, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
3. School of ICT-Advanced Device
Technology, University of Science and Technology, Daejeon 34113, Republic of Korea