Electrochemical behavior and effect of heat treatment on morphology, crystalline structure of self-organized TiO2 nanotube arrays on Ti–6Al–7Nb for biomedical applications

Mohan, L.; Anandan, C.; Rajendran, N.

doi:10.1016/j.msec.2015.02.013

Cited by 77 publications

(34 citation statements)

References 65 publications

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“…Furthermore, in all such works on pure Ti foils, the arrangements of the individual TiO 2 nanotubes showed to be aligned and well separated. Moreover, Mohan et al (2015) 23 verified that critical factors that affecting pore diameter depend on the alloy composition and the potencial anodizing.…”

Section: Resultsmentioning

confidence: 91%

“…At 430 ºC the anatase phase formed completely and a small rutile peak appeared, while at 620 ºC only the rutile peak was present. In the other hand, the work of Mohan et al (2015) 23 observed the presence of the anatase phase after heat treatment between 450 and 600 ºC. In samples treated at 700 ºC, part of the anatase turned into a rutile phase, and only at 850 ºC the dominant phase was rutile.…”

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confidence: 99%

“…Mohan et al, 23 investigated the formation of self-organized TiO 2 nanotubes layers by anodic oxidation on Ti-6Al-7Nb alloy for 1 hour at 10, 20 and 30 V in an electrolyte consisting of 1 M H 2 SO 4 and 0.08 M HF. Samples anodized at 10 V exhibited porous structure with diameter of ~35 nm and 250 nm of height.…”

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confidence: 99%

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Influence of Anodization Parameters in the TiO2 Nanotubes Formation on Ti-7.5Mo Alloy Surface for Biomedical Application

2017

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In this study, the effects of the parameters such as applied potential difference, time and annealing temperature in the titania nanotubes formation were evaluated. The morphology of the nanotubes was evaluted by using Field Emission Gun -Scanning Electron Microscope (FEG-SEM), Atomic Force Microscope (AFM), contact angle and X-rays diffraction (XRD). Self-organized nano-structures were formed on the Ti-7.5Mo alloy surface from the same electrolyte (glycerol/NH4F) for all conditions. It was observed that the potential influenced the diameter while the length was changed according to the anodization time lenght. The presence of the phases anatase and rutile was altered by annealing temperature. Results showed that 20V-48h-450 ºC was the better than other conditions for application as biomaterial.

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Section: Resultsmentioning

confidence: 91%

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confidence: 99%

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Influence of Anodization Parameters in the TiO2 Nanotubes Formation on Ti-7.5Mo Alloy Surface for Biomedical Application

2017

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“…In addition, organic components in the solution can facilitate the formation of the well-ordered TiO 2 nanotubes array, while solutions containing only glycerol suppress the formation of nanotubes structures. Mohan et al [32,33] have investigated the electrochemical behaviour of titania nanotubes in Hank's solution, starting from Ti-6Al-7Nb or Ti6Al4V alloys, which although being an interesting application, it is beyond the scope of this paper.…”

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confidence: 99%

TiO2 Nanotubes on Ti Dental Implant. Part 2: EIS Characterization in Hank’s Solution

Monetta

Acquesta

Carangelo

et al. 2017

Metals

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Titania nanotubes are widely studied for their potential applications in several fields. In this paper, the electrochemical characterization of a dental implant, made of commercially pure titanium grade 2, covered by titania nanotubes, when immersed in Hank's solution, is proposed. Few papers were found in the scientific literature regarding this topic, so a brief review is reported, concerning the use of some equivalent circuits to model experimental data. The analysis of results, obtained by using Electrochemical Impedance Spectroscopy, showed that: (i) a good correlation exists between the variation of E corr and the estimated values of the charge transfer resistance for both the bare-and the nanotube-covered samples, (ii) the nanostructured surface seems to possess a more active behaviour, while the effect could be over-estimated due to the real extent of the surface covered by nanotubes, (iii) the analysis of the "n" parameter, used to fit the experimental data, confirms the complex nature of nanostructured layer as well as that the nanotubes are partially filled by compounds containing Ca, P and Mg, when immersed in Hank's solution. The results obtained in this work give a better understanding of the electrochemical behaviour of the nanotubes layer when immersed in Hank's solution and could help to design a surface able to improve the implant osseointegration.

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“…Several reports have shown that a stable nanotube titanium oxide layer, obtained after a heat treatment, improves long-term implant performance due to greater corrosion resistance and oxide layer stability, which translates into a lesser metal ion release from a titanium implant into the human body [17,[39][40][41][42]. Mohan et al reported an anatase phase for nanotubes after being annealed at 450 • C. Nanotubes morphology obtained on this research present higher oxide thickness than the single passive layer formed on titanium alloys when exposed to air, improving the material corrosion resistance.…”

Section: Discussionmentioning

confidence: 99%

Influence of Heat Treatment and UV Irradiation on the Wettability of Ti35Nb10Ta Nanotubes

Lario¹,

Fombuena²,

Vicente³

et al. 2018

Metals

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Abstract:The implant osseointegration rate depends on the surface's topography and chemical composition. There is a growing interest in the anodic oxidation process to obtain an oxide layer with a nanotube morphology on beta titanium alloys. This surface treatment presents large surface area, nanoscale rugosity and electrochemical properties that may increase the biocompatibility and osseointegration rate in titanium implants. In this work, an anodic oxidation process was used to modify the surface on the Ti35Nb10Ta alloy to obtain a titanium nanotubes topography. The work focused on analyzing the influence of some variables (voltage, heat treatment and ultraviolet irradiation) on the wettability performance of a titanium alloy. The morphology of the nanotubes surfaces was studied by Field Emission Scanning Electron Microscopy (FESEM), and surface composition was analyzed by Energy Dispersive Spectroscopy (EDS). The measurement of contact angle for the TiO 2 nanotube surfaces was measured by a video contact angle system. The surface with the non photoinduced nanotubes presented the largest contact angles. The post-heat treatment lowered the F/Ti ratio in the nanotubes and decreased the contact angle. Ultraviolet (UV) irradiation of the TiO 2 nanotubes decrease the water contact angle.

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Electrochemical behavior and effect of heat treatment on morphology, crystalline structure of self-organized TiO2 nanotube arrays on Ti–6Al–7Nb for biomedical applications

Cited by 77 publications

References 65 publications

Influence of Anodization Parameters in the TiO2 Nanotubes Formation on Ti-7.5Mo Alloy Surface for Biomedical Application

Influence of Anodization Parameters in the TiO2 Nanotubes Formation on Ti-7.5Mo Alloy Surface for Biomedical Application

TiO2 Nanotubes on Ti Dental Implant. Part 2: EIS Characterization in Hank’s Solution

Influence of Heat Treatment and UV Irradiation on the Wettability of Ti35Nb10Ta Nanotubes

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