1. Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
2. Center for Atomically Thin Multifunctional Coatings, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
3. Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Shenzhen, Guangdong 518055, China
4. Center for 2-Dimensional and Layered Materials, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
5. Department of Material Science and Engineering, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
6. Department of Chemistry, The Pennsylvania State University, University Park, Pennsylvania 16802, United States
7. Department of Solid State Physics, Faculty of Physics and Applied Informatics, University of Lodz, Pomorska 149/153, Lodz 90-236, Poland
8. Department of Physics, University of Washington, Seattle, Washington 98195, United States
9. Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, Pennsylvania 16802, United States
10. Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive, Singapore 117456, Singapore
11. Texas Materials Institute and Department of Mechanical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
12. Imec, Kapeldreef 75, Heverlee 3001, Belgium
13. Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21287, United States
14. nanotech@surfaces Laboratory, Empa − Swiss Federal Laboratories for Materials Science and Technology, Dübendorf 8600, Switzerland
15. School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia
16. Institute of Physics, University of Münster, Wilhelm-Klemm-Str. 10, Münster 48149, Germany
17. Department of Electrical and Computer Engineering & Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, United States
18. Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, Dayton, Ohio 45433, United States
19. Department of Microtechnology and Nanoscience, Chalmers University of Technology, Göteborg SE-412 96, Sweden