1. Department of Materials Science & Engineering, Drexel University, Philadelphia, Pennsylvania 19104, USA
2. National Research Center “Kurchatov Institute”, Kurchatov Square 1, Moscow 123182, Russia
3. Moscow Institute of Physics and Technology (State University), MIPT, 9 Institutskiy per., Dolgoprudny, 141701 Moscow Region, Russia
4. Department of Materials Science & Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA
5. Department of Chemistry, Pennsylvania State University, University Park, Pennsylvania 16802, USA
6. Department of Physics, Pennsylvania State University, University Park, Pennsylvania 16802, USA
7. Department of Mechanical Engineering and Mechanics, Drexel University, Philadelphia, Pennsylvania 19104, USA
8. Department of Physics, Drexel University, Philadelphia, Pennsylvania 19104, USA