Electrochemical single-step obtention and characterization of a biomimetic TiO2-HA NTs covered by chitosan. Issue 11 (13th March 2019)

• Record Type: Journal Article
• Authors: Galvão, Rhauane Almeida; Santa-Cruz, Larissa Agostinho de; Barreto, Paloma Bantim; Horta, Marla Karolyne dos Santos; Andrade, Antonio Marcos Helgueira de; Moura, Francisco José; Aguilar, Marilza Sampaio; Peripolli, Suzana Bottega; Campos, José Brant de; Arruda, Isabel Renata de Souza; Machado, Giovanna
• Is Part Of: Journal of materials research. Volume 34:Issue 11(2019)
• Page Start: 1868
• Page End: 1878
• Publication Date: 2019-03-13
• Subjects: electrochemical synthesis, -- biomimetic (assembly), -- nanostructure; Materials -- Research -- Periodicals; 620.1105
• DOI: 10.1557/jmr.2019.23
• Languages: English
• ISSNs: 0884-2914

Abstract

Abstract: Abstract : Obtention of titanium (Ti)- and titanium dioxide (TiO2 )–based nanocomposites is of great interest for biological nanomaterial applications, including for dental implants. Their mechanical properties can be improved by use of hydroxyapatite (HA) and chitosan through their biological anchorage with osseointegration and antibacterial activity. Electrochemical methods were chosen to obtain these composites in a quick and controllable way. In this work, electrochemical synthesis in one (alternated potential) or two steps (alternated or constant potential) was successfully applied. The single step (SS) obtained TiO2 + HA sample had different optical properties, as shown using ultraviolet–visible spectrometry, and the HA phase formation was proved using Raman spectroscopy. Thereby, SS_TiO2 + HA increased the corrosion resistance of titanium in artificial saliva medium, as shown by linear polarization and electrochemical impedance spectroscopy results. When using chitosan, the samples showed two corrosion interfaces, indicating its dissolution in human medium. These results indicate that the samples are excellent materials for dental implants.