1. Department
of Electrical Engineering, Columbia University, New York, New York 10027, United States
2. Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, United States
3. Department of Chemistry, Columbia University, New York, New York 10027, United States
4. Theoretical Chemistry, TU Dresden, 01062 Dresden, Germany
5. Department of Mechanical
Engineering, Columbia University, New York, New York 10027, United States
6. Center
for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
7. Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, Nebraska 68588, United States