Characterization of a calcium phosphate–TiO2 nanotube composite layer for biomedical applications

Roguska, Agata; Pisarek, Marcin; Andrzejczuk, Mariusz; Dolata, M.; Lewandowska, M.; Janik‐Czachor, M.

doi:10.1016/j.msec.2011.02.009

Cited by 119 publications

(80 citation statements)

References 51 publications

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“…As shown in Figure 14, two broad bands Figure 14 shows the FT-IR spectrum of the precipitated apatite layer on the surface of the β-Ta coating after immersion in Hank's solution for seven days. As shown in Figure 14, two broad bands associated with the vibration of the water molecules adsorbed on the surface of the apatite layer can be detected, where one broad adsorption band locates between 3800 and 3000 cm −1 and another bending band appears at 1650 cm −1 [64]. The spectrum shows strong absorption bands around 900-1200 cm −1 and 450-700 cm −1 , which are assigned to the stretching and bending vibration of phosphate (PO 4 3− ) groups [66].…”

Section: Xps and Ft-ir Analysismentioning

confidence: 99%

“…The deconvolution of the C 1s spectrum (Figure 13e) reveals that it was composed of three peaks. The components at binding energies of 284.6 and 286.1 eV, respectively, correspond to hydrocarbon and hydroxyl carbon, which exist on the surface layer due to adventitious contamination from the surrounding environment [63,64]. The component at the highest binding energy of 287.7 eV is characteristic of carbonate groups CO3 2− [63,65].…”

Section: Xps and Ft-ir Analysismentioning

confidence: 99%

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Nanocrystalline β-Ta Coating Enhances the Longevity and Bioactivity of Medical Titanium Alloys

Liu

Jiang

2016

Metals

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A β-Ta nanocrystalline coating was engineered onto a Ti-6Al-4V substrate using a double cathode glow discharge technique to improve the corrosion resistance and bioactivity of this biomedical alloy. The new coating has a thickness of~40 µm and exhibits a compact and homogeneous structure composed of equiaxed β-Ta grains with an average grain size of~22 nm, which is well adhered on the substrate. Nanoindentation and scratch tests indicated that the β-Ta coating exhibited high hardness combined with good resistance to contact damage. The electrochemical behavior of the new coating was systematically investigated in Hank's physiological solution at 37 • C. The results showed that the β-Ta coating exhibited a superior corrosion resistance as compared to uncoated Ti-6Al-4V and commercially pure tantalum, which was attributed to a stable passive film formed on the β-Ta coating. The in vitro bioactivity was studied by evaluating the apatite-forming capability of the coating after seven days of immersion in Hank's physiological solution. The β-Ta coating showed a higher apatite-forming ability than both uncoated Ti-6Al-4V and commercially pure Ta, suggesting that the β-Ta coating has the potential to enhance functionality and increase longevity of orthopaedic implants.

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Section: Xps and Ft-ir Analysismentioning

confidence: 99%

Section: Xps and Ft-ir Analysismentioning

confidence: 99%

Nanocrystalline β-Ta Coating Enhances the Longevity and Bioactivity of Medical Titanium Alloys

Liu

Jiang

2016

Metals

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“…This layer with approximately 5 nm thickness forms spontaneously in air or water and exhibits favorable thermodynamic properties, and low ion formation and electrical conductivity in the physiological environment 5 . The stability of the titanium oxide film depends strongly on its composition, structure and thickness 17 .…”

Section: Titanium In Biomaterialsmentioning

confidence: 99%

“…Results indicated that the TiO 2 nanotubes enhance the process of apatite formation as compared to that on a common native oxide layer on titanium 84,129 , which considered to be an essential step for the bone-binding ability of biomaterials to the living bone. The incorporating of calcium phosphate crystals into the nanotubes can result in better adhesion of the coating to the substrate, and more osseointegration 17 .…”

Section: The Role Of Titanium Oxide Nanotube On the Improve The Osseomentioning

confidence: 99%

The Electrochemical Behavior of Titanium Improved by Nanotubular Oxide Formed by Anodization for Biomaterial Applications: A Review

Al-Swayih¹

2016

Orient. J. Chem

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Titanium oxide nanotube is gaining prominence in many applications like solar energy, sensors, catalyst and biomaterials. In this paper, we briefly review the electrochemical behavior of titanium oxide nanotube prepared by anodization in simulated body fluids. The electrochemical behavior of TiO 2 nanotube depends on its morphology and surface properties. When titanium oxide nanotube formed by anodization, these surface properties are depending strongly on two factors, the parameters of anodization process and the conditions of employed electrolyte. These factors must be chosen in correct manner to optimized titanium oxide nanotube with desired properties for specific application.

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“…Estos datos de absorción de calcio por las superficies están relacionadas con la capacidad que tienes las superficies de nanotestructuras para favorecer la adherencia de fosfatos de calcio [22]. Adicionalmente estos datos son comparables con lo reportado en [23], [24] y [25] donde se evaluó la formación de apatitas sobre nanotubos de TiO 2 por inmersión y encontraron mediante espectroscopia de infrarrojo que tras la inmersión en SBF se formó una capa de hidroxiapatita. Finalmente, a partir de los resultados de concentración inicial y final, se puede afirmar que las 4 nanoestructuras funcionalizadas presentaron una adsorción, en donde se debió favorecer la formación de una capa de apatita en la superficie.…”

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Biofuncionalización de Ti6Al4V mediante crecimiento de nanoestructuras de TiO 2 con contenido de calcio y fósforo

et al. 2016

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RESUMENEn este trabajo se evaluó el efecto de la electrodeposición de fosfato de calcio sobre nanoestructuras de TiO 2 . Para ello, se desarrollaron nanoestructuras de TiO 2 sobre sustratos de Ti6Al4V en una solución de NH 4 F y NH 4 H 2 PO 4 y posteriormente se realizó electrodeposición catódica empleando una solución compuesta de Ca(NO 3 ) 2 y (NH 4 ) 2 HPO 4 como electrolito. La morfología de las superficies se observó mediante microscopia electrónica de barrido y la capacidad de las superficies para formar apatitas se evaluó a través de absorción atómica tras inmersión de las muestras en fluido corporal simulado (SBF) durante 7 días. Finalmente se evaluó la respuesta electroquímica de las superficies biofuncionalizadas mediante pruebas de resistencia a la polarización y curvas potenciodinámicas. Estos ensayos permitieron observar un incremento en la resistencia a la degradación de las superficies biofuncionalizadas respecto al sustrato.Palabras clave: Biofuncionalización, nanoestructuras, Ti6Al4V, TiO 2 . ABSTRACTIn this work the effect of the electrodeposition of calcium phosphate on TiO2 nanostructures was evaluated. For that, TiO2 nanostructures were developed in a solution of NH4F and NH4H2PO4 on Ti6Al4V substrates and subsequent cathodic electrodeposition was performed using Ca(NO3)2 and (NH4)2HPO4 as electrolyte. The surface morphology was observed by scanning electron microscopy and the surface capacity to form apatites was evaluated by Atomic absorption spectroscopy after immersion of samples in simulated body fluid (SBF) for 7 days. Finally, the electrochemical response of biofunctionalized surfaces was evaluated by polarization resistance tests and potentiodynamic curves. These tests allowed to observe an increase in the resistance to degradation of biofunctionalized surfaces respect to the substrate.Keywords: Biofunctionalization, nanostructure, Ti6Al4V, TiO 2 . INTRODUCCIÓNMateriales metálicos como la aleación Cr-Co-Mo, el acero AISI 316 LVM y el Ti6Al4V han sido utilizados a lo largo de los años como biomateriales de osteosíntesis obteniendo grandes resultados [1], [2]. El principal requerimiento de estos materiales es que sean resistentes a sufrir alguna alteración en su superficie cuando son implantados en el cuerpo y que posean óptimas propiedades mecánicas enlazadas con una excelente biocompatibilidad [3]. Los dispositivos fabricados con estos materiales muestran un alto grado de aceptación por el cuerpo, buena respuesta celular y alta resistencia a la corrosión, donde la resistencia a la corrosión de estos materiales se deriva de la película estable de óxido que se forma en su superficie, la cual al dañarse, se reconstruye en presencia de fluidos fisiológicos [4], [5].

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Characterization of a calcium phosphate–TiO2 nanotube composite layer for biomedical applications

Cited by 119 publications

References 51 publications

Nanocrystalline β-Ta Coating Enhances the Longevity and Bioactivity of Medical Titanium Alloys

Nanocrystalline β-Ta Coating Enhances the Longevity and Bioactivity of Medical Titanium Alloys

The Electrochemical Behavior of Titanium Improved by Nanotubular Oxide Formed by Anodization for Biomaterial Applications: A Review

Biofuncionalización de Ti6Al4V mediante crecimiento de nanoestructuras de TiO 2 con contenido de calcio y fósforo

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