Creation of surface nanostructures in lanthanum fluoride single crystals by irradiation with slow highly charged ions
| Autor: | René Heller, A.S. El-Said, Stefan Facsko, Richard A. Wilhelm |
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| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Nanostructure Materials science Physics::Optics Ionic bonding chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Alkali metal 01 natural sciences Ion Condensed Matter::Materials Science Swift heavy ion Xenon chemistry Chemical physics 0103 physical sciences Physics::Atomic and Molecular Clusters Irradiation 010306 general physics 0210 nano-technology Instrumentation Electron beam ion trap |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 460:137-140 |
| ISSN: | 0168-583X |
| Popis: | Slow highly charged ions (HCI) were utilized successfully for the formation of various nanostructures in the surfaces of different materials. The creation mechanism of HCI-induced nanostructures was intensively studied in alkali- and alkaline-earth fluorides. Here, we are investigating another type of fluorine-containing ionic crystals of different crystalline and electronic structure, namely lanthanum fluoride, LaF3. The single crystals were irradiated with slow (eV-keV) highly charged xenon ions from an Electron Beam Ion Trap. After irradiation, the crystals surfaces were investigated by scanning force microscopy. The measured topographic images show nanohillocks emerging from the surface. These nanostructures were observed only after exceeding a well-defined threshold in the potential energy. The role of ion parameters for nanohillocks formation as well as a comparison with results for swift heavy ion irradiations of LaF3 single crystals are presented. Furthermore, the similarities and differences between LaF3 and other ionic fluoride crystals, in the creation of surface nanostructures, are discussed. |
| Databáze: | OpenAIRE |
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