Autor(es): Fatichi, Alberto Z. ; de Mello, Mariana G. ; Pereira, Karina D. ; Antonio, Luísa G.M. ; Luchessi, Augusto D. [UNESP] ; Caram, Rubens ; Cremasco, Alessandra
Data: 2022
Identificador Persistente: http://hdl.handle.net/11449/222888
Origem: Oasisbr
Assunto(s): Anodization; Bioactivity; Surface modification; Titanium dioxide nanotubes
Made available in DSpace on 2022-04-28T19:47:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2022-02-15
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
An investigation was made into the electrochemical, structural and biological properties of self-organized amorphous and anatase/rutile titanium dioxide (TiO2) nanotubes deposited on Ti–35Nb–4Zr alloy through anodization-induced surface modification. The surface of as-anodized and heat-treated TiO2 nanotubes was analyzed by field emission scanning electron microscopy (FE-SEM), revealing morphological parameters such as tube diameter, wall thickness and cross-sectional length. Glancing angle X-ray diffraction (GAXRD) was employed to identify the structural phases of titanium dioxide, while atomic force microscopy (AFM) was used to measure surface roughness associated with cell interaction properties. The electrochemical stability of TiO2 was examined by electrochemical impedance spectroscopy (EIS) and the results obtained were correlated with the microstructural characterization. The in vitro bioactivity of as-anodized and crystallized TiO2 nanotubes was also analyzed as a function of the presence of different TiO2 polymorphic phases. The results indicated that anatase TiO2 showed higher surface corrosion resistance and greater cell viability than amorphous TiO2, confirming that TiO2 nanotube crystallization plays an important role in the material's electrochemical behavior and biocompatibility.
University of Campinas (UNICAMP) School of Mechanical Engineering, Campinas
University of Campinas (UNICAMP) School of Applied Sciences, Limeira
São Paulo State University (UNESP) Institute of Biosciences, Rio Claro
São Paulo State University (UNESP) Institute of Biosciences, Rio Claro
FAPESP: 2014/00159-2
FAPESP: 2016/24693-3
CNPq: 407412/2018-2
