Role of aluminum doping on phase transformations in nanoporous titania anodic oxides

Bayata, Fatma; Ürgen, Mustafa

doi:10.1016/j.jallcom.2015.06.054

Cited by 3 publications

(1 citation statement)

References 40 publications

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“…The TiO2 nanotubes produced through electrochemical anodization are usually amorphous. Only after the post-production annealing treatment do they transition into an anatase or rutile crystalline structure [59][60][61][62]. Accordingly, in Figure 2, the as-anodized sample presents the same peaks as the as-polished sample, corresponding to the α-or β-phase of the alloy, while the heat-treated sample resulted in a crystalline TiO2.…”

Section: Tio 2 Nanotube Morphology and Structurementioning

confidence: 93%

Electrodeposition of Zn and Cu Nanoparticles into TiO2 Nanotubes on Ti6Al4V: Antimicrobial Effect against S. Epidermidis and Cytotoxicity Assessment

Ribeiro,

Offoiach,

Monteiro

et al. 2024

Micro

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Surface modification of the Ti6Al4V alloy (ASTM grade 5), with the fabrication of vertically oriented TiO2 nanotubes, has been receiving increasing attention both as a way to provide advanced bioactive features and the ability to act as reservoirs for a localized, controlled drug release. In this work, TiO2 nanotubes were grown on the surface of a Ti6Al4V alloy through electrochemical anodization. An ethylene glycol-based electrolyte containing 0.5 wt.% NH4F and 2.5% (v/v) H2O was used. Post-anodizing heat treatments at 500 °C in air atmosphere were performed to achieve a crystalline oxide layer with a higher mechanical stability. Following these treatments, Zn or Cu nanoparticles were incorporated into the nanotubular structures through electrodeposition processes. Then, the antimicrobial performance of the obtained surfaces was assessed against Staphylococcus epidermidis, a Gram-positive bacterium common in implant-related infections. Lastly, the cytotoxicity of the produced surface was evaluated against MC3T3-E1 mouse pre-osteoblast cells. In general, Cu-doped TiO2 nanotubes presented an almost total antimicrobial action, while Zn doped samples had a lower, but still significant antibacterial effect. However, a highly cytotoxic effect against MC3T3-E1 cells was observed on all anodized samples due to the release of vanadium from the alloy. In spite of this, the surface modification reported in this work can be a valid solution for existing commercially available orthopedic implants, considering that similar solutions were already studied in in vivo assays.

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Section: Tio 2 Nanotube Morphology and Structurementioning

confidence: 93%

Electrodeposition of Zn and Cu Nanoparticles into TiO2 Nanotubes on Ti6Al4V: Antimicrobial Effect against S. Epidermidis and Cytotoxicity Assessment

Ribeiro,

Offoiach,

Monteiro

et al. 2024

Micro

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Micro-arc Oxidation Coating Formed on Anodized Aluminum Surface under Different Pulse Frequencies

Zhao¹

2017

International Journal of Electrochemical Science

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The microstructure and corrosion behavior of the micro-arc oxidation (MAO) coating formed on the surface of anodization film under different pulse frequencies have been investigated. Microstructure of the coatings were examined by scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and X-ray diffractometer (XRD). Corrosion resistance of anodized coatings were evaluated by potentiodynamic polarization. The results reveal that the coating surface is more compact and the corrosion resistance is better with corrosion current one order of magnitude lower than coatings at lower frequencies. The surface roughness and hardness increased with the pulse frequencies. Al peaks decreased with the pulse frequency, indicating that more and more compact structure existed in the coatings.

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Effect of Anodization and Heat Treatments, in Air or in Vacuum Conditions, on the Corrosion Resistance of Cp-Ti and Ti6al4v

Ribeiro,

Offoiach,

Petruzzi

et al. 2023

Preprint

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Role of aluminum doping on phase transformations in nanoporous titania anodic oxides

Cited by 3 publications

References 40 publications

Electrodeposition of Zn and Cu Nanoparticles into TiO2 Nanotubes on Ti6Al4V: Antimicrobial Effect against S. Epidermidis and Cytotoxicity Assessment

Electrodeposition of Zn and Cu Nanoparticles into TiO2 Nanotubes on Ti6Al4V: Antimicrobial Effect against S. Epidermidis and Cytotoxicity Assessment

Micro-arc Oxidation Coating Formed on Anodized Aluminum Surface under Different Pulse Frequencies

Effect of Anodization and Heat Treatments, in Air or in Vacuum Conditions, on the Corrosion Resistance of Cp-Ti and Ti6al4v

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