1. Department
of Chemistry, Rice University, Houston, Texas 77005, United States
2. Department of Mechanical Engineering & Materials Science, Rice University, Houston, Texas 77005, United States
3. School
of Materials Science and Engineering, School of Electrical and Electronic
Engineering Nanyang Technological University, 639798, Singapore
4. Materials Science & Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
5. Department
of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, United States
6. Department
of Physics and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
7. Department of Chemistry, Department of Materials Science and Engineering & Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
8. Research
Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato
4-17-1, Nagano 380-8553, Japan