1. School
of Electrical and Computer Engineering, Georgia Institute of Technology, 777 Atlantic Drive NW, Atlanta, Georgia 30332, United States
2. School
of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332, United States
3. Department
of Electrical Engineering and Center for Nanoscale Science, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
4. Department of Mechanical & Industrial Engineering and Department of Electrical & Computer Engineering, Northeastern University, Boston, Massachusetts 02115, United States
5. Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433, United States