Influence of morphology and crystalline structure of TiO2 nanotubes on their electrochemical properties and apatite-forming ability

Hilario, Fanny; Roche, Virginie; Nogueira, R.P.; Jorge, Alberto Moreira

doi:10.1016/j.electacta.2017.05.160

Cited by 67 publications

(41 citation statements)

References 46 publications

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“…According to [3], the formation of TiO 2 NT at a voltage higher than 80 V is almost impossible. Indeed, most recent results in [7][8][9] concerning anodization process were evaluated for voltage parameters from 10-75 V.…”

Section: Introductionmentioning

confidence: 99%

“…As the NT applied on the surface of skeletal/dental implants are mainly intended to prevent implant rejection and consequently prevent life-threatening secondary surgeries [4], the impact of the structural and morphological aspects of TiO 2 NT on their application as implant coating is significant. It has been already remarked using in vitro studies that the morphology and composition of TiO 2 NT influence biocompatibility [8,12], thereby showing bioactivity of bone cells on titanium implant surfaces. However, further studies are needed to determine the anodizing parameters as well as the microstructure effect resulting in internal stresses in NT coatings.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and Properties of Nanostructured Coating on Ti6Al4V

et al. 2020

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Implant surface properties of Ti6Al4V alloy that is currently used as a biocompatible material because of a variety of unique properties can be improved by a self-organized TiO2 layer. The TiO2 nanotubes forming on the titanium-based materials is a relatively recent technology for the surface properties modification and represents pronounced potential in promoting cell adhesion, proliferation, and differentiation that facilitate an implant osseointegration. This work focuses on the influence of surface treatment quality and anodic oxidation parameters on the structure features and properties of TiO2 nanotube coatings. The nanotubes were formed on Ti6Al4V alloy substrates by simultaneous surface oxidation and controlled dissolving of an oxide film in the presence of fluorine ions. The anodization process on ground or polished samples was performed at experimental condition of 30 V for 1 h. The selected anodized samples were heat treated for 2 h at 500 °C under flowing argon. All samples were characterized by scanning electron microscopy, X-ray diffraction analysis, and Raman spectroscopy. The corrosion rate in physiological solution reached 0.0043, 0.0182, and 0.0998 mm per year for the samples in polished and not-anodized, as-anodized, and anodized-heat treated conditions, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microstructure and Properties of Nanostructured Coating on Ti6Al4V

et al. 2020

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“…The graph reveals the characteristics of the diffraction peaks of titanium at 2θ values of 35 103) and (112) planes, respectively, for all the tested samples. Although, in this research the traditional Bragg-Brentano system was used, the sample anodized in viscous electrolyte, characterized by a nanotubes layer thick 8 µm, showed a weak peak at 2θ values of 27.37 • , corresponding to the (110) phase [17,43]. This event highlighted the presence of a rutile structure of titanium oxide, due to the annealing process carried out at 700 • C to avoid the formation of the "nano-grass" layer during the anodization in the "organic" electrolyte.…”

Section: Xrd Analysismentioning

confidence: 99%

“…The anodic oxide film grown on titanium substrate may exhibit a compact, porous or nanotubular structure by changing the anodizing process parameters, such as the voltage applied, the duration of the anodizing, the electrolyte composition, and so on [7][8][9][10][11][12][13][14]. With the coming of nanomaterials, it has been observed that nanostructured surfaces tend to improve cell-implant interaction, stimulating the cell-adhesion processes [15,16] as the osseointegration mechanism [17][18][19][20][21]. Tsuchiya et al showed a significant growth of hydroxyapatite (bone-like calcium phosphate) on TiO 2 nanotube layers compared to flat compact titanium oxide layers [22].…”

Section: Introductionmentioning

confidence: 99%

“…Tsuchiya et al showed a significant growth of hydroxyapatite (bone-like calcium phosphate) on TiO 2 nanotube layers compared to flat compact titanium oxide layers [22]. Hilario et al [17] investigated the influence of the morphology and the crystalline structure of the titanium nanotubes on the apatite-forming ability, suggesting the best compromise between the nanotubes size and their crystalline phase. In addition, these kinds of nanostructures could be used as a reservoir for drug delivery applications [23][24][25].…”

Section: Introductionmentioning

confidence: 99%

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TiO2 Nanotubes on Ti Dental Implant. Part 3: Electrochemical Behavior in Hank’s Solution of Titania Nanotubes Formed in Ethylene Glycol

Acquesta

Carangelo

Monetta

2018

Metals

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Anodic oxidation is an easy and cheap surface treatment to form nanostructures on the surface of titanium items for improving the interaction between metallic implants and the biological environment. The long-term success of the devices is related to their stability. In this work, titanium nanotubes were formed on a dental screw, made of titanium CP2, through an anodization process using an "organic" solution based on ethylene glycol containing ammonium fluoride and water. Then, the electrochemical stability in the Hank's solution of these "organic" nanotubes has been investigated for 15 days and compared to that of titanium nanotubes on a similar type of sample grown in an inorganic solution, containing phosphoric and hydrofluoridric acids. Morphological and crystallographic analysis were performed by using scanning electron microscopy (SEM) and X-Ray diffractometry (XRD) tests. Electrochemical measurements were carried out to study the stability of the nanotubes when are in contact with the biological environment. The morphological measurements revealed long nanotubes, small diameters, smooth side walls, and a high density of "organic" nanotubes if compared to the "inorganic" ones. XRD analysis demonstrated the presence of rutile form. An appreciable electrochemical stability has been revealed by Electrochemical Impedance Spectroscopy (EIS) analysis, suggesting that the "organic" nanotubes are more suitable for biomedical devices.

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Evaluation of annealed titanium oxide nanotubes on titanium: From surface characterization to in vivo assays

Sanchez

Katunar

Pastore

et al. 2020

J Biomedical Materials Res

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The entire route from anodic oxidation and surface characterization, including in vitro experiments and finally in vivo osseointegration assays were performed with the aim to evaluate nanotubular and crystalline annealed titanium oxides as a suitable surface for grade 2 titanium permanent implants. Polished titanium (T0) was compared with anodized surfaces obtained in acidic media with fluoride, leading to an ordered nanotubular structure of titanium oxide on the metal surface, characterized by tube diameter of 89 ± 24 nm (Tnts). Samples were thermally treated in air (TntsTT) to increase the anatase crystalline phase on nanotubes, with minor alteration of the structure. Corrosion tests were performed to evaluate the electrochemical response after 1, 14, and 28 days of immersion in simulated body fluid. Based on the in vitro results, heat‐treated titanium nanotubes (TntsTT) were selected as a promissory candidate to continue with the osseointegration in vivo assays. The in vivo results showed no major improvement in the osseointegration process when compared with untreated Ti after 30 days of implantation and there also was a lower increase in the development of new osseous tissue.

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Influence of morphology and crystalline structure of TiO2 nanotubes on their electrochemical properties and apatite-forming ability

Cited by 67 publications

References 46 publications

Microstructure and Properties of Nanostructured Coating on Ti6Al4V

Microstructure and Properties of Nanostructured Coating on Ti6Al4V

TiO2 Nanotubes on Ti Dental Implant. Part 3: Electrochemical Behavior in Hank’s Solution of Titania Nanotubes Formed in Ethylene Glycol

Evaluation of annealed titanium oxide nanotubes on titanium: From surface characterization to in vivo assays

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