1. Department
of Materials Science and Engineering and Center for 2-Dimensional
and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
2. Institute
of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
3. Department
of Electrical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
4. Department
of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080 United States
5. Sandia National Laboratories, Albuquerque, New Mexico 87185, Untied States
6. Naval Research Laboratory, Washington,
DC 20375, United States
7. Physical
Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia