RETRACTED: The effect of titanium alloy composition in synthesis of Titania nanotubes

Yashwanth, I. V. S.; Gurrappa, I.

doi:10.1016/j.matlet.2014.12.010

Cited by 9 publications

(8 citation statements)

References 24 publications

(18 reference statements)

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“…For Ti alloys it is expected that the growth of films depends on the type of crystalline phase, number of phases and their surface distribution, as well as on the type and concentration of the constitutive elements [24,25]. However, few researchers make a consistent report about this subject for b-type alloys [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Characterization of the morphology, structure and wettability of phase dependent lamellar and nanotube oxides on anodized Ti-10Nb alloy

Luz

Santos

Lepienski

et al. 2018

Applied Surface Science

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Nanotubes grown on Ti and its alloys have been extensively investigated for the biomaterials applications, since these structures improve the surface biocompatibility and the corrosion resistance due to oxide formation. Some researchers showed that the microstructure of the pure Ti affect the morphology of nanotubes grown by anodic process. However, this subject is rarely investigated for nanotubes grown on Ti alloys. In the same way, nanostructured films formed by concomitant regions of tubes and lamellar structures hardly ever were reported. Investigations concerning these topics are required once beta titanium alloys are suitable candidates to replace the pure Ti and Ti-Al-V alloys for biomedical applications. Beta alloys composed of non-toxic elements (Nb, Ta, Mo) are biocompatible and have an excellent mechanical properties and corrosion resistance. The present work investigated questions regarding to the effect of microstructure of Ti-10Nb alloy on morphology of nanostructured film growth by anodization. The morphology, thickness, composition and atomic arrangement (amorphous/crystalline) of formed oxides, and the contact angle of anodic film were investigated. The X-ray diffraction patterns and SEM image show that the Ti-10Nb alloy is composed by alpha (hcp) and beta (bcc) phases. SEM and TEM techniques revel that self-organized nanotubes grew on alpha phase, whereas a lamellar structure with transversal holes grew on b-phase. Crystalline oxides are formed at oxide-metal interface, as indicated by X-ray diffraction patterns. However, the tubes and lamellas grown over the compact oxide are amorphous, as-prepared and annealed at 230°C for 3 h, as showed by SAED patterns. The nanostructured films annealed at 430°C and at 530°C were damaged. A few changes were observed in XRD patterns of film annealed at 230°C while the morphology held similar as the unannealed film. Finally, the presence of phosphorus ions incorporated into the anodic layer makes the surface hydrophilic, since a similar nanostructured film without phosphorous incorporation results hydrophobic.

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Section: Introductionmentioning

confidence: 99%

Characterization of the morphology, structure and wettability of phase dependent lamellar and nanotube oxides on anodized Ti-10Nb alloy

Luz

Santos

Lepienski

et al. 2018

Applied Surface Science

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“…35,36 The later method is more favorable for the fabrication of one dimensional TiO 2 nanomaterials, e.g. 39,40 The structure of TiO 2 nanotubes is not clearly defined, however, it is assumed that hydrogen titanate is present where the TiO 2 sheets are separated by H + ions. 30,37 Moreover, the electrochemical anodization technique is considered more favorable for nanotube synthesis, in addition to the chemical template synthesis and alkaline hydrothermal treatment, 38 and allows great control over the dimensions during the synthesis.…”

Section: Nano-tio 2 Fabricationmentioning

confidence: 99%

Biomedical applications of nano-titania in theranostics and photodynamic therapy

et al. 2016

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Titanium dioxide (TiO2) is one of the most abundantly used nanomaterials for human life. It is used in sunscreen, photovoltaic devices, biomedical applications and as a food additive and environmental scavenger. Nano-TiO2 in biomedical applications is well documented. It is used in endoprosthetic implants and early theranostics of neoplastic and non-neoplastic maladies as a photodynamic therapeutic agent and as vehicles in nano-drug delivery systems. Herein, we focus on the recent advancements and applications of nano-TiO2 in bio-nanotechnology, nanomedicine and photodynamic therapy (PDT).

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“…Among the various techniques, introducing TiO 2 nanotubes on the surface of Ti through anodization has gained attention as it is a simple, cost efficient and well controlled methodology. However, parameters such as electrolyte composition, voltage and the duration of anodization have been shown to alter the morphology of the surface [6,7]. In the current study, we used five different conditions to investigate and compare the effects of substrate composition and anodization parameters on successful formation of nanotubes on both CP-Ti and Ti-6Al-4V [8,9].…”

Section: Introductionmentioning

confidence: 99%

Bone marrow stromal cells interaction with titanium; Effects of composition and surface modification

et al. 2019

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Inflammation and implant loosening are major concerns when using titanium implants for hard tissue engineering applications. Surface modification is one of the promising tools to enhance tissue-material integration in metallic implants. Here, we used anodization technique to modify the surface of commercially pure titanium (CP-Ti) and titanium alloy (Ti-6Al-4V) samples. Our results show that electrolyte composition, anodization time and voltage dictated the formation of well-organized nanotubes. Although electrolyte containing HF in water resulted in nanotube formation on Ti, the presence of NH4F and ethylene glycol was necessary for successful nanotube formation on Ti-6Al-4V. Upon examination of the interaction of bone marrow stromal cells (BMSCs) with the modified samples, we found that Ti-6Al-4V without nanotubes induced cell proliferation and cluster of differentiation 40 ligand (CD40L) expression which facilitates B-cell activation to promote early bone healing. However, the expression of glioma associated protein 2 (GLI2), which regulates CD40L, was reduced in Ti-6Al-4V and the presence of nanotubes further reduced its expression. The inflammatory cytokine interleukin-6 (IL-6) expression was reduced by nanotube presence on Ti. These results suggest that Ti-6Al-4V with nanotubes may be suitable implants because they have no effect on BMSC growth and inflammation.

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RETRACTED: The effect of titanium alloy composition in synthesis of Titania nanotubes

Cited by 9 publications

References 24 publications

Characterization of the morphology, structure and wettability of phase dependent lamellar and nanotube oxides on anodized Ti-10Nb alloy

Characterization of the morphology, structure and wettability of phase dependent lamellar and nanotube oxides on anodized Ti-10Nb alloy

Biomedical applications of nano-titania in theranostics and photodynamic therapy

Bone marrow stromal cells interaction with titanium; Effects of composition and surface modification

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