1. Research Center for Exotic Nanocarbons (Japan Science and Technology Agency, JST), 4-17-1 Wakasato, Nagano 380-8553, Japan
2. Advanced
Materials Department, Instituto Potosino de Investigación Científica y Tecnológica (IPICYT), Camino a la Presa San José
2055, Col. Lomas 4a Sección, San Luis
Potosí, San Luis Potosí 78216, México
3. Department
of Physics, Applied Physics and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
4. Department
of Fundamental Chemistry, Universidade Federal de Pernambuco, Av. Prof.
Luiz Freire, Recife, Pernambuco 50740-540, Brazil
5. Institute
of Carbon Science and Technology, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
6. Department
of Physics, Chemistry, Materials Science and Engineering, Center for
2-Dimensional and Layered Materials and Materials Research Institute, The Pennsylvania State University, 104 Davey Laboratory, University Park, Pennsylvania 16802-6300, United States