1. Improved biodegradability of Fe–Mn alloy after modification of surface chemistry and topography by a laser ablation
- Author
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Črtomir Donik, Peter Gregorčič, Matej Hočevar, Irena Paulin, Aleksandra Kocijan, and Matjaž Godec
- Subjects
Oxide ,General Physics and Astronomy ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,law.invention ,Corrosion ,chemistry.chemical_compound ,X-ray photoelectron spectroscopy ,udc:620.1/.2 ,biodegradability ,law ,surface engineering ,XPS depth profiles ,biorazgradljivost ,laserska ablacija ,mangan ,Laser ablation ,technology, industry, and agriculture ,Chemical modification ,zlitine ,železo ,Surfaces and Interfaces ,General Chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Laser ,0104 chemical sciences ,Surfaces, Coatings and Films ,chemistry ,Chemical engineering ,laser ablation ,Wetting ,0210 nano-technology ,Fe-Mn alloy ,Layer (electronics) - Abstract
In this study we report the influence of laser ablation on the controlled biodegradability of a Fe–Mn alloy developed for medical implants. After texturing by a nanosecond Nd:YAG laser, the surface expressed extreme super-hydrophilic wetting properties, since laser ablation led to micro-channels and chemical modification resulting in nanostructured metal oxides. The influence of functionalized surface properties on corrosion behavior was examined on molecular level by using X-ray photoelectron spectroscopy. Results reveal that the oxide layer after the laser texturing of Fe–Mn alloy consists mainly of Fe2O3 and FeO, with the content of Mn in the oxide layer being significantly higher than in the bulk. The results of the electrochemical measurements clearly demonstrate the superior biodegradability of the Fe–Mn alloy samples functionalized by laser ablation. Here, the laser-triggered corrosion is self-driven by further production of corrosion products that leads to biodegradability of the whole sample.
- Published
- 2018
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