Akademik Veri Yönetim Sistemi
Journal of Molecular Structure, cilt.1363, 2026 (SCI-Expanded, Scopus)
Titanium alloys are widely used in biomedical implants, yet their limited ability to chemically bond with bone remains a challenge. Herein, Ti6Al4V surfaces were modified by micro-arc oxidation in Ca-P containing acidic electrolytes newly investigated in this study and alkaline electrolytes previously reported by our group, using different EDTA-Na2 concentrations, followed by UV-assisted treatment to tailor pore morphology, phase structure, surface roughness, and wettability. The findings demonstrated that EDTA-Na2 plays a decisive role in controlling surface features, with its effect strongly dependent on the electrolyte environment. Notably, the coating produced in the acidic electrolyte (sample A4) exhibited a Ca/P ratio of 1.70, closely matching the theoretical value of hydroxyapatite (1.67). In vitro bioactivity tests carried out in simulated body fluid (SBF) indicated that samples prepared in acidic media possessed superior apatite-forming ability. Subsequently, silver nanoparticles were immobilized onto the MAO-treated surfaces via a UV-driven photochemical route, yielding an unusual thread-like nanoparticle morphology. These nanostructures imparted pronounced antimicrobial activity against Candida albicans, Escherichiacoli, Staphylococcus aureus, and methicillin-resistant Staphylococcus aureus. The UV-assisted formation of thread-like silver nanostructures on MAO-coated titanium surfaces, previously demonstrated by our group in alkaline systems, is in this work systematically extended and comparatively evaluated for Ca–P containing acidic electrolytes.