Simulation of anodizing current-time curves and morphology evolution of TiO2 nanotubes anodized in electrolytes with different NH4F concentrations

Zhang, Yulian; Fan, Haowen; Xu, Dianguo; Yan, Qinghai; Wang, Liping; Ma, Wenhui

doi:10.1016/j.electacta.2015.07.110

Cited by 42 publications

(23 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In all cases, as the voltage is risen also the internal nanotube diameter increases, the direct relationship between internal diameter and applied potential has been described in previous studies. Zhang et al 40 and Lee et al 41 found different morphologies in nanotubes formed at different values of conductivity and Sopha et al 43 reported an increase in internal diameter proportional to the increment of the conductivity for nanotubes produced in organic media. The internal nanotube diameter of samples formed at 10 V is similar (around 30 nm) with a slightly bigger diameter for the sample treated in a NaF containing solution.…”

Section: Discussionmentioning

confidence: 99%

Formation of nanotubular TiO₂ structures with varied surface characteristics for biomaterial applications

Aguirre

Echeverry‐Rendón

Quintero

et al. 2018

J Biomedical Materials Res

View full text Add to dashboard Cite

Nanotubular structures were generated on the surface of titanium c.p. by anodization technique in an aqueous solution of acetic acid (14% v/v) with different sources of fluoride ion (HF, NaF, NH F). The aim of using these three different compounds is to study the effect of the counterion (H , Na and NH4+) on the morphology, wettability and surface free energy of the modified surface. Nanotubes were generated at 10 and 15 V for each anodizing solution. To further improve surface characteristics, the samples were heat-treated at 600°C for 4 h and at 560°C for 3 h. SEM images revealed the formation of nanotubes in all anodizing conditions, while their diameter increased proportionally to the electric potential. X-ray diffraction and micro-Raman spectroscopy results showed the presence of both anatase and rutile phases, with a higher content of rutile in the coatings obtained using NH F and an applied potential of 10 V. The heat-treatment significantly increased the wettability of the anodic coatings, especially for the coating obtained at 15 V with HF, which showed values < 7 degrees of contact angle. Besides, the nanotubes show a decrease in diameter due to the heat treatment, except for the nanotubes formed in NH F. Depending on their surface properties (e.g. low contact angle and high surface free energy), these coatings potentially have great potential in biomedical applications, sensors devices, and catalytic applications among others. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1341-1354, 2018.

show abstract

Section: Discussionmentioning

confidence: 99%

Formation of nanotubular TiO₂ structures with varied surface characteristics for biomaterial applications

Aguirre

Echeverry‐Rendón

Quintero

et al. 2018

J Biomedical Materials Res

View full text Add to dashboard Cite

show abstract

“…To obtain self-organized nanotubes can be used mixtures of the phosphoric acid plus fluorine ions, for example NH 4 F, HF and NaF [29][30][31][32]. The success to grow nanotubes with these electrolytes can be attributed to fact that the phosphoric acid acts as a buffer species regulating the local acidification during pore growth [29].…”

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

View full text Add to dashboard Cite

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.

show abstract

“…16,19,[40][41][42][43] Ionic current is used to form oxide while electronic current is used to form oxygen bubbles. 16,19,[40][41][42][43] Nanotubes are formed by the combined effect of oxide formation and oxygen bubble expansion. 16,19,[40][41][42][43] Fig .…”

Section: Forming Mechanism Of Multilayer Anodic Tio 2 Nanotubesmentioning

confidence: 99%

“…[16][17][18] Therefore, newly formed oxide ows around these oxygen bubbles and forms anodic TiO 2 nanotubes. [16][17][18][19] Otherwise, the introduction of new electrolyte is helpful for exploiting new architectures and understanding the formation mechanism of anodic TiO 2 nanotubes. Although anodic TiO 2 nanotubes have been obtained in HBF 4 -containing electrolyte, none novel architecture of anodic TiO 2 nanotube has been reported.…”

Section: Introductionmentioning

confidence: 99%

Formation mechanism of multilayer TiO₂nanotubes in HBF₄electrolyte

Zhang

Xu³

et al. 2017

RSC Adv.

View full text Add to dashboard Cite

show abstract

Simulation of anodizing current-time curves and morphology evolution of TiO2 nanotubes anodized in electrolytes with different NH4F concentrations

Cited by 42 publications

References 48 publications

Formation of nanotubular TiO₂ structures with varied surface characteristics for biomaterial applications

Formation of nanotubular TiO₂ structures with varied surface characteristics for biomaterial applications

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

Formation mechanism of multilayer TiO₂nanotubes in HBF₄electrolyte

Contact Info

Product

Resources

About

Simulation of anodizing current-time curves and morphology evolution of TiO2 nanotubes anodized in electrolytes with different NH4F concentrations

Cited by 42 publications

References 48 publications

Formation of nanotubular TiO2 structures with varied surface characteristics for biomaterial applications

Formation of nanotubular TiO2 structures with varied surface characteristics for biomaterial applications

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

Formation mechanism of multilayer TiO2nanotubes in HBF4electrolyte

Contact Info

Product

Resources

About

Formation of nanotubular TiO₂ structures with varied surface characteristics for biomaterial applications

Formation of nanotubular TiO₂ structures with varied surface characteristics for biomaterial applications

Formation mechanism of multilayer TiO₂nanotubes in HBF₄electrolyte