1. Department
of Materials Science and Engineering, Materials Research Institute,
and Center for 2D and Layered Materials (2DLM), The Pennsylvania State University, University Park, Pennsylvania 16802, United States
2. Department
of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States
3. Department
of Materials Science and Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States
4. Department
of Mechanical Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
5. Two-Dimensional
Crystal Consortium (2DCC), The Pennsylvania State University, University Park, Pennsylvania 16802, United States
6. Paul-Drude-Institut für Festkörperelektronik, Hausvogteiplatz 5-7, Berlin 10117, Germany
7. Department
of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
8. Department
of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15213, United States