Electrochemical stability of TiO2 nanotubes with different diameters in artificial saliva

Liu, Chenglong; Yueji, Wang; Wang, Meng; Huang, Weijiu; Chu, Paul K.

doi:10.1016/j.surfcoat.2011.06.038

Cited by 40 publications

(32 citation statements)

References 19 publications

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“…Taking into account that the composition of the alloys, the nanotubes dimensions and their interspaces were different, the results are not consistent. Some authors report higher corrosion current densities for nanotubular structures, whereas others reported that the electrochemical stability of TiO 2 nanotubes with diameters of 22–59 nm increased and that of TiO 2 nanotubes with diameter larger than 86 nm decreased. J.‐U.…”

Section: Introductionmentioning

confidence: 97%

“…Electrochemical stability in bioliquids is one of the most important characteristics of metallic surgical implants, as Ti and Ti alloys, and was intensively studied in various media and at different temperatures . One of the recently used procedures in order to improve corrosion behavior of such implants consists in building nanoarchitectures as nanotubes on the metallic substrate . Nowadays, TiO 2 nanotubes are relatively easily obtained by electrochemical anodizing .…”

Section: Introductionmentioning

confidence: 99%

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Electrochemical behavior in simulated body fluid of TiO2 nanotubes on TiAlNb alloy elaborated in various anodizing electrolyte

Mazare

Dilea

Ioniță

et al. 2014

Surface & Interface Analysis

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The present study is focused on tailoring the morphology of TiO 2 nanotubes obtained on Ti6Al7Nb alloy and evaluating their electrochemical behavior in simulated body fluid. The presence of the α and β phases on the Ti6Al7Nb alloy leads to a two-scale organization of the nanotubes on the sampleswhich in turn affects the electrochemical stability. Furthermore, five different types of TiO 2 nanotubes were obtained in various electrolytes (e.g. Generation I, a mixture of Generation II and Generation III, Generation III). Electrochemical behavior analysis of all obtained nanotubes morphologies was composed of Tafel plots, cyclic voltammetry and electrochemical impedance spectroscopy and was correlated with morphology data obtained from SEM (nanotubes diameters from top-view and nanotube length from cross-section view). The electrochemical results showed that morphological modifications of the Ti6Al7Nb alloy's surface by electrochemical anodizing have induced changes to the electrochemical behavior of the material, evident in the corrosion rates.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Electrochemical behavior in simulated body fluid of TiO2 nanotubes on TiAlNb alloy elaborated in various anodizing electrolyte

Mazare

Dilea

Ioniță

et al. 2014

Surface & Interface Analysis

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“…The change of the equivalent circuit used to model the data cannot permit a comparison between the values of the parameter found. Al-Mobarak and Al-Swayih [29], following Liu [30], produced titanium nanotubes in three kinds of solutions to obtain nanotubes showing different diameters, varying from 52 to 93 nm, and different length nanotubes, from 250 to 1200 nm. The samples, made of titanium foil (99.5%), were anodized at 20 V for 30 min in the electrolyte made of 1 M Na 2 SO 4 and 0.5 wt % NaF (1 solution), or 1 M H 3 PO 4 and 0.8 wt % NaF (2 solution), or 0.5 wt % HF (3 solution).…”

mentioning

confidence: 99%

“…Wen [27] found the best fit by using a model containing a Warburg element, when analyzing nanotubes 100 nm in diameter. Al-Mobarak [30], studying nanotubes varying from 52 to 93 nm in diameter and 250 to 1200 nm in length, did not have this need. On the other hand, due to the lack of works available in the field, it is not possible to perform a statistical analysis of the results, in order to find a correlation between the chemical/physical properties of the nanotubes and the electrical equivalent circuit models used.…”

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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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“…The oxides formed through this methodology have become attractive due to the paramount performance exhibited by semiconductor TiO 2 films in photocatalytic and photoelectrochemical applications, biomaterials and corrosion resistance. [1][2][3][4] Indeed, the features and performance of these films associated with the aforementioned applications can be directly related to the electronic properties and crystal structure of these materials. For instance, the surface coloration, electrocatalytic activity, corrosion resistance, light refraction and absorption of the films rely upon the properties and crystal structure of the material.…”

mentioning

confidence: 99%

Ti Anodization in Alkaline Electrolyte: The Relationship between Transport of Defects, Film Hydration and Composition

Acevedo–Peña

Vazquez‐Arenas

Cabrera-Sierra

et al. 2013

J. Electrochem. Soc.

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The hydration state and structural transformations of Ti films potentiostatically grown in 0.1 M NaOH are characterized utilizing EIS, Mott-Schottky and XPS techniques. Variations presented in the density of donors, the flatband potential and the fraction of species measured by XPS, in the region of characterization of these films are associated with changes in the ratio of different Ti sub-oxides within the passive film. Oxygen and hydroxyl vacancies and their respective formation rate constants are estimated from EIS spectra fits with a modified Point Defect Model. A consistent behavior is observed for the hydration state and structural transformations of the films as a function of potential. Films anodized at less positive potentials than 1.17 V vs SCE present higher hydroxyl vacancy diffusivities (e.g higher film hydration) and a heterogeneous mixture of titanium sub-oxides, whereas the opposite behavior is observed for films formed at more positive potentials than 1.17 V vs SCE, where the hydroxyl vacancy diffusivities decrease by one order of magnitude and the oxygen vacancy diffusivities increase three times. Thus, films anodized at more positive potentials present a higher dehydration, are more homogeneous and mainly composed of TiO 2 .Titanium anodization consists of the formation of an oxide layer on a Ti substrate by electrolytic polarization. The oxides formed through this methodology have become attractive due to the paramount performance exhibited by semiconductor TiO 2 films in photocatalytic and photoelectrochemical applications, biomaterials and corrosion resistance. 1-4 Indeed, the features and performance of these films associated with the aforementioned applications can be directly related to the electronic properties and crystal structure of these materials. For instance, the surface coloration, electrocatalytic activity, corrosion resistance, light refraction and absorption of the films rely upon the properties and crystal structure of the material. [5][6][7][8] This anodization could entail the transition through multiple intermediary oxidation states (TiO, Ti 2 O 3 , Ti 3 O 5 and/or Ti 4 O 7 ). 9-31 The proportion of these oxides within the anodic films varies depending on the conditions utilized to anodize, e.g. applied potential, time, electrolyte composition. This transition also affects the crystallinity and photoelectrochemical performance of TiO 2 photoanodes, as well as their corrosion resistance. 32,33 Molar fraction of chemical species vs E diagrams for the Ti-H 2 O system reveals that the formation of Ti sub-oxides could be connected to the hydration state of the oxide film, since the stability of the TiO 2 is displaced to more positive potentials when hydrated oxides are involved in the thermodynamic calculations. 34 Different characterization techniques have been used to study the formation of these intermediary oxides in different electrolytes. [10][11][12]15,18,19,21,[23][24][25]30,32,34 However, to date few studies have correlated the formation of these sub-oxides with their...

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Electrochemical stability of TiO2 nanotubes with different diameters in artificial saliva

Cited by 40 publications

References 19 publications

Electrochemical behavior in simulated body fluid of TiO2 nanotubes on TiAlNb alloy elaborated in various anodizing electrolyte

Electrochemical behavior in simulated body fluid of TiO2 nanotubes on TiAlNb alloy elaborated in various anodizing electrolyte

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

Ti Anodization in Alkaline Electrolyte: The Relationship between Transport of Defects, Film Hydration and Composition

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