1. Electron Microscopy for Material Science (EMAT), University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
2. Chemistry Department, Moscow State University, 119991 Moscow, Russia
3. Physics Department, Moscow State University, 119991 Moscow, Russia
4. Theoretical Physics and Applied Mathematics Department, Ural Federal University, 620002 Ekaterinburg, Russia
5. National University of Science and Technology “MISiS″, 119049 Moscow, Russia
6. Skolkovo Institute of Science and Technology, Nobel str. 3, 143026 Moscow, Russia