20.500.12556/DiRROS-22991 Alumina and hafnia thin films deposited by atomic layer deposition at different temperatures on biomedical stainless steel and titanium Alumina and hafnia films produced by the atomic layer deposition were applied to commercially pure Ti and stainless steel 316L specimens for protection under simulated human body conditions. The ALD films were deposited at 180 °C and 260 °C to determine how the deposition temperature affect the films' protective properties. Surface analysis of the ALD films included scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The barrier properties were tested electrochemically using potentiodynamic polarisation and electrochemical impedance spectroscopy (EIS) techniques in a simulated body solution at 37 °C. Alumina thin films showed substantial barrier properties, but after 30 days of immersion, the alumina dissolved regardless of the deposition temperature. EIS tests themselves promoted the dissolution of alumina. In contrast, the barrier properties of hafnia depended significantly on deposition temperature. Hafnia deposited at 180 °C exhibited substantial protective properties and remarkable stability over an extended immersion period. However, when deposited at 260 °C hafnia films showed strong protection at the outset, but after a few days of immersion, they lost their protective ability due to porosity. The key factors affecting the barrier properties of ALD hafnia films were the proportion of the crystalline phase and how crystallites formed. thin films atomic layer deposition titanium alloys biomedical steel medical implants tanke plasti titanove zlitine medicinsko jeklo medicinski vsadki true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2025 The Authors. Neznano 2025-07-15 09:54:34 2025-07-15 09:54:34 2025-10-24 03:52:54 0000-00-00 00:00:00 2025 0 0 Nasl. z nasl. zaslona; Soavtorice: Sandra Drev, Urška Trstenjak, Ingrid Milošev; Opis vira z dne 14. 7. 2025; str. 1-13 Vol. 537, [article no.] 146849 Oct. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-05-05 2025-07-03 2025-07-04 546.3/.9 1873-3859 10.1016/j.electacta.2025.146849 242439171 https://www.sciencedirect.com/science/article/pii/S0013468625012095?via%3Dihub 1 f380a34e-6150-11f0-9bb7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=33630 RAZ_Spajic_Ivan_2025.pdf RAZ_Spajic_Ivan_2025.pdf 1 77EE20C3A7A2BCB601F141FFB4F10A65 dee6a90a402920d4d760d7c0b26a4f7da97f8ce61a60ae83eb28fbc5a5dd0081 bc737e9b-6151-11f0-9bb7-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=33631 Institut Jožef Stefan 0 0 0