1. Department of Physics, The Pennsylvania State University, 104 Davey Lab, University Park, Pennsylvania 16802-6300, United States
2. Advanced Materials Department, IPICYT, Camino a la Presa San José 2055, Lomas 4a. Sección, San Luis Potosí 78216, México
3. Center for Nanoscience and Nanotechnology-UNAM, Km 107 Carretera Tijuana-Ensenada, Ensenada, B. C, 22860, México
4. Department of Physics, Rensselaer Polytechnic Institute, Troy, New York 12280, United States
5. Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Place Croix du Sud 1 (NAPS-Boltzmann), B-1348 Louvain-la-Neuve, Belgium
6. Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/RX, Wright-Patterson Air Force Base, Ohio 45433, United States
7. Department of Physics, Department of Materials Science and Engineering, and Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802-6300, United States, and Research Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato 4-17-1, Nagano 380-8553, Japan
8. Oak Ridge National Laboratory, One Bethel Valley Road, Oak Ridge, Tennessee 37831-6367, United States