Preparation of near micrometer-sized TiO2 nanotube arrays by high voltage anodization

Ni, Jiahua; Noh, Kunbae; Frandsen, Christine J.; Kong, Seong Deok; He, Guo; Tang, Tingting; Jin, Sung‐Ho

doi:10.1016/j.msec.2012.08.038

Cited by 37 publications

(37 citation statements)

References 31 publications

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“…6b and c). This pattern might be due to comparably increased field-aided dissolution and etching of the TiO 2 at the nanotube bottom by fluoride ions [46]. Furthermore, looking at the tube length in detail, when the potential was increased to 100 V at the end of the anodization time, the resulting nanotubes were significantly longer than those nanotubes fabricated with a constantly applied potential, which have a length of approximately 10 µm and an aspect ratio of ~71.…”

Section: Influence Of the Electrolyte Age On The Nanotube Diameter Anmentioning

confidence: 98%

“…This results in lower current densities since fewer fluoride ions remain available, and the pH value and viscosity are changing [46]. Furthermore, more time is needed to reach the maximum in current density.…”

Section: Influence Of the Electrolyte Age On The Nanotube Diameter Anmentioning

confidence: 99%

“…Subsequently the IR drop becomes lower for older electrolytes and the real potential on the working electrode increased. Since the diameter of the nanotubes strongly depends on the applied potential [38][39][40][41][42][43]46], the diameter of the tubes increased with increasing age of the electrolytes. Evidently, the electrolyte can actually be used several times without any significant issues of lower quality.…”

Section: Influence Of the Electrolyte Age On The Nanotube Diameter Anmentioning

confidence: 99%

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Effect of electrolyte age and potential changes on the morphology of TiO2 nanotubes

Sopha

Hromádko

Nechvílová

et al. 2015

Journal of Electroanalytical Chemistry

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In the present work we report on the influence of the age of ethylene glycol-based electrolytes on the synthesis of self-organized TiO 2 nanotube layers. Electrolytes of different ages, defined by the total duration for anodization, were explored in order to get insight about how the tube structure changes with the electrolyte age. The results show a strong dependence of the electrolyte age upon the nanotube length and diameter -a phenomena surprisingly not discussed in existing literature. When fresh electrolytes are employed, nanotube arrays with a high aspect ratio are received, while in older electrolytes (i.e. already used for anodization) the nanotube arrays exhibit low aspect ratios. This is very important aspect for the reproducible synthesis of the nanotube layers. Moreover, the effect of the potential on the nanotube dimensions was investigated. Linear dependence of the diameter upon the potential was observed. Last, but not least, the influence of a potential change towards the end of the anodization time was studied. By sweeping the potential to 100 V, or to 5 V and keeping this for one hour after applying a constant potential of 60 V for 4 hours, nanotubes underwent interesting morphological changes. In particular, when slow sweeping from 60 V to 5 V was carried out, small nanotubes grew in the gaps between the initial nanotubes. Interestingly, these nanotubes layers showed lower adhesion to the underlying substrates.

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Section: Influence Of the Electrolyte Age On The Nanotube Diameter Anmentioning

confidence: 98%

Section: Influence Of the Electrolyte Age On The Nanotube Diameter Anmentioning

confidence: 99%

Section: Influence Of the Electrolyte Age On The Nanotube Diameter Anmentioning

confidence: 99%

See 1 more Smart Citation

Effect of electrolyte age and potential changes on the morphology of TiO2 nanotubes

Sopha

Hromádko

Nechvílová

et al. 2015

Journal of Electroanalytical Chemistry

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“…In organic electrolytes, such as the most typical ethylene glycol with 0 -13 wt.% of H 2 O and < 1 M of F -, higher diameters can be achieved 203,[211][212][213][214][215][216][217] ; in optimized electrolytes diameters up to 800 nm have been reported 214 -see Figure 7.d.…”

Section: Factors Influencing the Morphology Of The Anodic Filmmentioning

confidence: 99%

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

2014

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“…In aqueous electrolytes, for example, it has been proposed that a regular tubular structure is produced by the evolution of oxygen bubbles through the recently formed oxide [16]. In organic electrolytes, which are preferred because their use allows for the growth of tubes over a very wide range of lengths [17] and diameters [18], there is considerable controversy regarding the growth mechanism [16]. Two different mechanisms are broadly accepted.…”

Section: Introductionmentioning

confidence: 99%

Empirical kinetics for the growth of titania nanotube arrays by potentiostatic anodization in ethylene glycol

et al. 2016

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Preparation of near micrometer-sized TiO2 nanotube arrays by high voltage anodization

Cited by 37 publications

References 31 publications

Effect of electrolyte age and potential changes on the morphology of TiO2 nanotubes

Effect of electrolyte age and potential changes on the morphology of TiO2 nanotubes

One-Dimensional Titanium Dioxide Nanomaterials: Nanotubes

Empirical kinetics for the growth of titania nanotube arrays by potentiostatic anodization in ethylene glycol

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