1. School of Advanced Materials Science and Engineering, SKKU Advanced
Institute of Nanotechnology (SAINT), Center for Human Interface Nanotechnology
(HINT), SKKU-Samsung Graphene Center, Sungkyunkwan University (SKKU), Suwon 440-746, Republic of Korea
2. Graphene Center, Samsung Advanced Institute of Technology, Yongin 446-712, Republic of Korea
3. SKKU Advanced Institute of Nanotechnology
(SAINT), Department of Electronic and Electrical Engineering, Sungkyunkwan University (SKKU), Suwon 440-746, Republic
of Korea