1. Center for Composite
Materials, University of Delaware, Newark, Delaware 19716, United States
2. Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716, United States
3. Weapons and Materials Research Directorate, U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
4. Department of Physics and Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, 104 Davey Lab, University
Park, Pennsylvania 16802-6300, United States
5. Research Center for Exotic Nanocarbons (JST), Shinshu University, Wakasato 4-17-1, Nagano, 380-8553, Japan
6. Department of Chemistry and Department
of Materials Science and Engineering, The Pennsylvania State University, 104 Davey Lab, University Park, Pennsylvania 16802-6300, United States
7. Department of Polymer
Science and Engineering, Sungkyunkwan University, 300 Chunchun-dong, Jangan-gu, Suwon 440-746, South Korea