Arsenic contamination of coarse-grained and nanostructured nitinol surfaces induced by chemical treatment in hydrofluoric acid
Autor(en): | Korotin, D. M. Bartkowski, S. Kurmaev, E. Z. Borchers, C. Mueller, M. Neumann, M. Gunderov, D. V. Valiev, R. Z. Cholakh, S. O. |
Stichwörter: | arsenic contamination; Engineering; Engineering, Biomedical; Materials Science; Materials Science, Biomaterials; nitinol; TiO2; XPS | Erscheinungsdatum: | 2012 | Herausgeber: | WILEY | Journal: | JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS | Volumen: | 100B | Ausgabe: | 7 | Startseite: | 1812 | Seitenende: | 1816 | Zusammenfassung: | XPS measurements of coarse-grained and nanostructured nitinol (Ni50.2Ti49.8) before and after chemical treatment in hydrofluoric acid (40% HF, 1 min) are presented. The nanostructured state, providing the excellent mechanical properties of nitinol, is achieved by severe plastic deformation. The near-surface layers of nitinol were studied by XPS depth profiling. According to the obtained results, a chemical treatment in hydrofluoric acid reduces the thickness of the protective TiO2 oxide layer and induces a nickel release from the nitinol surface and an arsenic contamination, and can therefore not be recommended as conditioning to increase the roughness of NiTi-implants. A detailed evaluation of the resulting toxicological risks is given. (C) 2012 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2012. |
ISSN: | 15524973 | DOI: | 10.1002/jbm.b.32748 |
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geprüft am 23.05.2024