Changes in the chemical compound and local atomic structure of ultrathin surface layers of Fe due to implantation of argon and oxygen ions
| Autor: | I. K. Averkiev, A. A. Kolotov, F. Z. Gil’mutdinov, O. R. Bakieva, O. M. Nemtsova |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Auger electron spectroscopy
Materials science Argon Oxide Analytical chemistry General Physics and Astronomy chemistry.chemical_element 02 engineering and technology Surfaces and Interfaces General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Oxygen 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Ion implantation X-ray photoelectron spectroscopy Chemical bond chemistry 0210 nano-technology Spectroscopy |
| Zdroj: | Applied Surface Science. 539:148243 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2020.148243 |
| Popis: | In this work, we consider the effect of irradiation in Ar+ → O+ and O+ → Ar+ sequences on changes in the chemical compound, type of chemical bond and the local atomic structure of ultrathin (~20 nm) iron surface layers. Investigation of the chemical compound and the type of chemical bond of the ion-modified surface was carried out by the XPS (X-ray photoelectron spectroscopy) and Auger electron spectroscopy. The study of changes in the local atomic structure was carried out by an XAFS-like method — electron energy loss fine structure (EELFS) spectroscopy. The parameters of the local atomic environment of oxygen and iron — partial interatomic distances, dispersion parameters, and coordination numbers — were obtained by analyzing atomic pair correlation functions. Analysis of experimental data showed that the two-stage irradiation of iron significantly changes the chemical compound and local atomic structure of the initial surface. This leads to formation of an oxide layer of greater depth than in the case of irradiation with only oxygen ions. |
| Databáze: | OpenAIRE |
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