Mechanisms of surface nanostructuring of Al2O3 and MgO by grazing incidence irradiation with swift heavy ions
| Autor: | Nikita Medvedev, Pavo Dubček, J.H. O'Connell, Marika Schleberger, Stjepko Fazinić, Lara Brockers, G. Provatas, K. Tomić Luketić, Marko Karlušić, Alexander E. Volkov, R.A. Rymzhanov, Zdravko Siketić, M. Jakšić |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Surface (mathematics)
Condensed Matter - Materials Science Nanostructure Materials science Recrystallization (geology) Ion beam Physics General Physics and Astronomy Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Surfaces and Interfaces General Chemistry Physik (inkl. Astronomie) 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 010305 fluids & plasmas Surfaces Coatings and Films Ion Chemical physics 0103 physical sciences Irradiation 0210 nano-technology ion irradiation irradiation effects swift heavy ion atomic force microscopy MD simulation |
| Zdroj: | Surfaces and Interfaces |
| Popis: | We experimentally discovered that Al2O3 and MgO exhibit well-pronounced nanometric modifications on the surfaces when irradiated under grazing incidence with 23 MeV I beam, in contrast to normal incidence irradiation with the same ion beam when no damage was found. Moreover, ions in these two materials produce notably different structures: grooves surrounded with nanohillocks on MgO surfaces vs. smoother, roll-like discontinuous structures on the surfaces of Al2O3. To explain these results, detailed numerical simulations were performed. We identified that a presence of the surface inhibits recrystallization process, thereby preventing transient tracks from recovery, and thus forming observable nanopatterns. Furthermore, a difference in the viscosities in molten states in Al2O3 vs. MgO explains the differences in the created nanostructures. Our results thus provide a deeper understanding of the fundamental processes of surface nanostructuring, potentially allowing for controlled production of periodic surface nanopatterns. |
| Databáze: | OpenAIRE |
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