1. Department
of Chemical and Biomolecular Engineering, Rice University, Houston, Texas 77005, United States
2. Richard
E. Smalley Institute for Nanoscale Science and Technology, Rice University, Houston, Texas 77005, United States
3. Communications
Technology Laboratory, National Institute of Standard and Technology, Boulder, Colorado 80305, United States
4. Material
Science and Engineering Division, National Institute of Standard and Technology, Gaithersburg, Maryland 20899, United States
5. Materials
and Structural System Division, National Institute of Standard and Technology, Gaithersburg, Maryland 20899, United States
6. NIST Center
for Neutron Research, National Institute of Standard and Technology, Gaithersburg, Maryland 20899, United States
7. Materials
Science and Engineering Department, University of Maryland, College Park, Maryland 20742, United States
8. Biology
and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
9. Department
of Chemistry, Rice University, Houston, Texas 77005, United States
10. Center
for Nanoscale Science and Technology, National Institute of Standard and Technology, Gaithersburg, Maryland 20899, United States
11. Maryland
Nanocenter, University of Maryland, College Park, Maryland 20742, United States
12. Physical
Measurement Laboratory, National Institute of Standard and Technology (NIST), Gaithersburg, Maryland 20899, United States