1. Department
of Chemistry, University of California—Berkeley, Materials Sciences Division, Lawrence Berkeley National Laboratory,
and Kavli Energy NanoSciences Institute, Berkeley, California 94720, United States
2. Nanotube
Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan
3. Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
4. SMBU, JEOL Ltd., Akishima,
Tokyo 196-8558, Japan
5. Department
of Materials and Environmental Chemistry and EXSELENT, Stockholm University, SE-106 91 Stockholm, Sweden
6. Graduate
School of EEWS, WCU/BK21Plus, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, Republic of Korea
7. King Abdulaziz City of Science and Technology, P.O. Box 6086, Riyadh 11442, Saudi Arabia