Self-organized TiO2 nanotubes on Ti-Nb-Fe alloys for biomedical applications: Synthesis and characterization

Autor(es)

Rios, Juliana ; Santini, Victor N. ; Pereira, Karina D. ; Luchessi, Augusto D. ; Lopes, Eder S. N. ; Caram, Rubens ; Cremasco, Alessandra

• Tipo de documento: Artigo Científico
• Fonte: Electrochemistry Communications; v. 138, p. 10-pg., 2022-05-01.

Resumo

Titanium-based biomaterials with a self-organized titanium oxide (TiO2) surface have received considerable attention in recent years owing to enhanced cellular response and bactericidal behavior promoted by the nanostructured surface. The aim of this study was to investigate the effect of Fe addition on the formation and crystallization of TiO2 nanotubes on Ti-30Nb-xFe substrates and the effect of TiO2 crystallinity on biological behavior. Self-ordered TiO2 nanotubes were prepared by anodization of Ti-30Nb-xFe (x = 0, 3, and 5 wt%) alloys using an aqueous 0.3% HF (vol.%) electrolyte. The nanotube morphology, structure, and composition as a function of the annealing temperature were characterized using FE-SEM, XRD and XPS. The crystallization of nanotubes to the rutile phase occurred at similar temperatures for samples with or without Fe addition, and a mixture of anatase and rutile was observed at 675 degrees C. The cell viability profile on different surfaces was investigated by MTT and adhesion assays, which revealed improved in vitro response to the crystalline nanotubes. (AU)

• Processo FAPESP: 14/00159-2 - Estudo eletroquímico de ligas de Ti beta metaestáveis revestidas com filmes nanoestruturados de TiO2
• Beneficiário: Alessandra Cremasco
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 18/18293-8 - Ligas de titânio: transformações de fases e manufatura aditiva aplicadas na obtenção de materiais com gradientes funcionais
• Beneficiário: Rubens Caram Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 19/06951-3 - Rastreamento das ações moleculares do aminoácido hipusina
• Beneficiário: Augusto Ducati Luchessi
• Modalidade de apoio: Auxílio à Pesquisa - Regular