Control of morphology and composition of self-organized zirconium titanate nanotubes formed in (NH4)2SO4/NH4F electrolytes

Yasuda, Kouji; Schmuki, Patrik

doi:10.1016/j.electacta.2006.11.023

Cited by 210 publications

(191 citation statements)

References 27 publications

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“…In general, nanotubes obtained by anodization have a V-shaped morphology; that is, nanotubes near the bottom have smaller inner diameter than those further from the bottom. 22), 23) In this study, the nanotubes near the bottom have larger inner diameters than those further from the bottom. Moreover, hydroxyl ions were oxidized at the anode and O 2 evolution was inevitable.…”

Section: Resultsmentioning

confidence: 99%

One-step realization of open-ended TiO2 nanotube arrays by transition of the anodizing voltage

Zhang

2010

J. Ceram. Soc. Japan

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Free-standing TiO 2 nanotubes with both their ends open are required in many applications. This article reports the authors' latest progress in meeting these requirements. Elevating the voltage at the end of an anodization process can break the adhesion of the TiO 2 nanotube layer to the underlying Ti substrate and simultaneously open their bottoms. Furthermore, by modulating the value and duration of the elevated voltage, the bottom morphology of the nanotubes can also be effectively tailored. Compared with most of the related work, in which obtaining free-standing TiO 2 nanotube layers and opening their bottom ends are often performed in two separate procedures, this newly-developed route features a simple one-step solution and also good controllability. Both the detachment of the nanotubes from the Ti substrate and the tailoring of their bottom ends are ascribable to the local acidification and gas evolution induced by the sudden voltage transition.

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Section: Resultsmentioning

confidence: 99%

One-step realization of open-ended TiO2 nanotube arrays by transition of the anodizing voltage

Zhang

2010

J. Ceram. Soc. Japan

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“…3 Furthermore, during the last years, it was shown that also other valve metals, such as Zr [15][16][17] and Nb [18,19], and several Ti binary [20][21][22], ternary [23,24] and quaternary alloys [25,26] can be anodized to nanotubular or nanoporous structures in fluoride containing electrolytes. The nanotubes grown on these alloys are similar to pure TiO 2 nanotubes.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

“…For instance, on some of these alloys, nanotubes with different scales were developed during anodization at a constant potential [22,23,25,26]. Moreover, in case of the binary Ti-35Zr alloy nanotubes with alternating compositions were observed when the fluoride content in the electrolyte was changed [20]. To the best of our knowledge, all these substrate materials had a crystalline structure.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Self-organized double-wall oxide nanotube layers on glass-forming Ti-Zr-Si(-Nb) alloys

Sopha

Pohl

Damm

et al. 2017

Materials Science and Engineering: C

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In this work, we report for the first time on the use of melt spun glass-forming alloysTi 75 Zr 10 Si 15 (TZS) and Ti 60 Zr 10 Si 15 Nb 15 (TZSN) -as substrates for the growth of anodic oxide nanotube layers. Upon their anodization in ethylene glycol based electrolytes, highly ordered nanotube layers were achieved. In comparison to TiO 2 nanotube layers grown on Ti foils, under the same conditions for reference, smaller diameter nanotubes (~116 nm for TZS and ~90 nm for TZSN) and shorter nanotubes (~11.5 µm and ~6.5 µm for TZS and TZSN, respectively) were obtained for both amorphous alloys. Furthermore, TEM and STEM studies, coupled with EDX analysis, revealed a double-wall structure of the as-grown amorphous oxide nanotubes with Ti species being enriched in the inner wall, and Si species in the outer wall, whereby Zr and Nb species were homogeneously distributed.

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“…controlled diameter achieved during improved oxide growth kinetics. For the last 5 years in several papers [61][62][63][64] it has been revealed that the value of polarisation determines the diameter of nanotubes. Every additional 5V of potential increases the nanotubes diameter of about 20nm, whereas the time of anodizing determines the length of the nanotube layer.…”

Section: Nanostructural Oxide Layer Formed In Phosphate Solutionsmentioning

confidence: 99%

“…titania and alumina, is explained by a fieldenhanced model [11,61,63,69] that depends on the ability of ions to diffuse through the metal oxide. Thus, due to the large size the incorporation of the phosphate ions is difficult, but the increased fluoride concentration in solution leads to its ability to migrate and intercalate into the oxide films during the anodizing [70].…”

Section: Competition Between Phosphates and Fluridesmentioning

confidence: 99%

Anodic Layer Formation on Titanium and Its Alloys for Biomedical Applications

Krasicka-Cydzik¹

2012

Titanium Alloys - Towards Achieving Enhanced Properties for Diversified Applications

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Control of morphology and composition of self-organized zirconium titanate nanotubes formed in (NH4)2SO4/NH4F electrolytes

Cited by 210 publications

References 27 publications

One-step realization of open-ended TiO2 nanotube arrays by transition of the anodizing voltage

One-step realization of open-ended TiO2 nanotube arrays by transition of the anodizing voltage

Self-organized double-wall oxide nanotube layers on glass-forming Ti-Zr-Si(-Nb) alloys

Anodic Layer Formation on Titanium and Its Alloys for Biomedical Applications

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