1. Department of Electronic Materials, Samsung SDI Company Ltd., Suwon 443-803, Republic of Korea
2. Department of Chemistry, University of Texas at Austin, 1 University Station, A5300, Austin, Texas 78712, United States
3. Seton Hill University, One Seton Hill Drive, Greensburg, Pennsylvania 15601, United States
4. Center for Multidimensional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 689-798, Republic of Korea
5. Department of Chemistry and Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Republic of Korea