Characterization and mechanical properties of TiO2 nanotubes formed on titanium by anodic oxidation

Durdu, Salih; Cihan, Gizem; Yalçın, Emine; Altinkok, A.

doi:10.1016/j.ceramint.2020.12.218

Cited by 52 publications

(28 citation statements)

References 39 publications

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“…Similar NTs and AFM results were also obtained in 1 M sodium dihydrogen phosphate (NaH 2 PO 4 ) + 0.3 wt.% HF, 20 V, 2 h [ 120 ], or as listed in Figure 7 c,d for NTs grown on TiZr alloy by an optimized double anodization approach in a glycerol-based electrolyte with 15 vol.% H 2 O and 0.2 M NH 4 F (75 V, 1 h in the 2nd step) [ 121 ]. An overview of the average roughness (Ra) values, which is arithmetic means of the deviation in height from the profile mean value, encountered in literature for NTs grown on Ti or Ti alloys, are compiled in Figure 7 e. While Ti has reported Ra values in the range of 10.7–22.7 nm, NTs have roughness values in the range of 17–112 nm depending on morphology, i.e., diameter size, where usually higher applied voltages lead to a certain point to higher diameters [ 78 , 119 , 120 , 121 , 122 , 123 , 124 , 125 , 126 ], or, to a certain extent, to the annealing treatments (a slight increase in roughness is observed, with increasing the annealing temperature and the appearance of the rutile crystalline phase) [ 127 ]. In addition, also the inner diameter value is included in this overview where available (either not mentioned in the respective article or values were in a wide range of values due to the initiation layer covering the nanotubes).…”

Section: Anodic Tio 2 Nanotubesmentioning

confidence: 99%

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Anodic TiO2 Nanotubes: Tailoring Osteoinduction via Drug Delivery

et al. 2021

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TiO2 nanostructures and more specifically nanotubes have gained significant attention in biomedical applications, due to their controlled nanoscale topography in the sub-100 nm range, high surface area, chemical resistance, and biocompatibility. Here we review the crucial aspects related to morphology and properties of TiO2 nanotubes obtained by electrochemical anodization of titanium for the biomedical field. Following the discussion of TiO2 nanotopographical characterization, the advantages of anodic TiO2 nanotubes will be introduced, such as their high surface area controlled by the morphological parameters (diameter and length), which provides better adsorption/linkage of bioactive molecules. We further discuss the key interactions with bone-related cells including osteoblast and stem cells in in vitro cell culture conditions, thus evaluating the cell response on various nanotubular structures. In addition, the synergistic effects of electrical stimulation on cells for enhancing bone formation combining with the nanoscale environmental cues from nanotopography will be further discussed. The present review also overviews the current state of drug delivery applications using TiO2 nanotubes for increased osseointegration and discusses the advantages, drawbacks, and prospects of drug delivery applications via these anodic TiO2 nanotubes.

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Section: Anodic Tio 2 Nanotubesmentioning

confidence: 99%

“…( e ) Overview of Ra values on Ti, TiO 2 nanotubes or nanotubes on TiZr alloy (Ra and diameter values from refs. [ 78 , 120 , 121 , 122 , 123 , 124 , 125 , 126 , 127 ]; *—value of Rq).…”

Section: Figurementioning

confidence: 99%

Anodic TiO2 Nanotubes: Tailoring Osteoinduction via Drug Delivery

et al. 2021

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“…Despite these virtues, nonetheless, there remain limited studies that compare Fe and Ag as promotors for TiO2 nanotubes-, especially in degrading microplastics and disinfection of E. Coli. Furthermore, the titania nanotubes used by most researchers are mainly immobilized on rectangular titanium (Ti) plates [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Polyethylene Microplastics and Disinfection of E. coli in Water over Fe- and Ag-Modified TiO2 Nanotubes

Yuwendi

Ibadurrohman

Setiadi

et al. 2022

Bull. Chem. React. Eng. Catal.

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In this study, Fe- and Ag-modified TiO2 nanotubes were synthesized via an anodization method as photocatalysts for degradation of polyethylene microplastics and disinfection of Escherichia coli (E. coli). The anodization voltage, as well as the Fe3+ or Ag+ concentrations on TiO2 nanotubes were evaluated and correlated to their corresponding photocatalytic properties. TiO2 nanotubes were firstly synthesized by anodization of Ti plates in a glycerol-based electrolyte, followed by incorporation of either Fe or Ag via a Successive Ionic Layer Adsorption and Reaction (SILAR) method with Fe(NO3)3 and AgNO3 as Fe and Ag precursors, respectively. UV-Vis DRS shows that the addition of Fe or Ag on TiO2 nanotubes causes a redshift in the absorption spectra. The X-ray diffractograms indicate that, in the case of Fe-modified samples, Fe3+ was successfully incorporated into TiO2 lattice, while Ag scatters around the surface of the tubes as Ag and Ag2O nanoparticles. A microplastic degradation test was carried out for 90 mins inside a photoreactor with UVC illumination. TiO2 nanotubes that are anodized with a voltage of 30 V exhibit the best degradation results with 17.33% microplastic weight loss in 90 mins. Among the modified TiO2 nanotubes, 0.03 M Ag-TiO2 was the only one that surpassed the unmodified TiO2 in terms of microplastic degradation in the water, offering up to 18% microplastic weight loss in 90 min. In terms of E. coli disinfection, 0.03M Ag-TiO2 exhibit better performance than its unmodified counterpart, revealing 99.999% bactericidal activities in 10 mins. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

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“…Nanosized titanium dioxide (TiO 2 ) has high mechanical strength and good corrosion resistance [1], as well as photocatalytic activity [2]. In addition to its highly oxidative, antibacterial [3] and self-cleaning [4] properties, TiO 2 also has excellent photostability, being the most available and affordable photocatalyst known to date [5].…”

Section: Introductionmentioning

confidence: 99%

Fe-N Co-Doped Titanium Dioxide Nanoparticles Induce Cell Death in Human Lung Fibroblasts in a p53-Independent Manner

Nica

Stan

Popescu

et al. 2021

IJMS

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The advancement of nanotechnology in the last decade has developed an abundance of novel and intriguing TiO2-based nanomaterials that are widely used in many sectors, including industry (as a food additive and colorant in cosmetics, paints, plastics, and toothpaste) and biomedicine (photoelectrochemical biosensing, implant coatings, drug delivery, and new emerging antimicrobial agents). Therefore, the increased use of engineered nanomaterials in the industry has raised serious concern about human exposure and their unexpected cytotoxic effects. Since inhalation is considered the most relevant way of absorbing nanomaterials, different cell death mechanisms induced in MRC-5 lung fibroblasts, following the exposure to functionalized TiO2 NPs, were investigated. Long-term exposure to TiO2 nanoparticles co-doped with 1% of iron and nitrogen led to the alteration of p53 protein activity and the gene expression controlled by this suppressor (NF-kB and mdm2), DNA damage, cell cycle disruptions at the G2/M and S phases, and lysosomal membrane permeabilization and the subsequent release of cathepsin B, triggering the intrinsic pathway of apoptosis in a Bax- and p53-independent manner. Our results are of major significance, contributing to the understanding of the mechanisms underlying the interaction of these nanoparticles with in vitro biological systems, and also providing useful information for the development of new photocatalytic nanoparticles that are active in the visible spectrum, but with increased biocompatibility.

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Characterization and mechanical properties of TiO2 nanotubes formed on titanium by anodic oxidation

Cited by 52 publications

References 39 publications

Anodic TiO2 Nanotubes: Tailoring Osteoinduction via Drug Delivery

Anodic TiO2 Nanotubes: Tailoring Osteoinduction via Drug Delivery

Photocatalytic Degradation of Polyethylene Microplastics and Disinfection of E. coli in Water over Fe- and Ag-Modified TiO2 Nanotubes

Fe-N Co-Doped Titanium Dioxide Nanoparticles Induce Cell Death in Human Lung Fibroblasts in a p53-Independent Manner

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