Nanoporous anodic aluminium oxide: Advances in surface engineering and emerging applications

Jani, Abdul Mutalib Md; Lošić, Dušan; Voelcker, Nicolas H.

doi:10.1016/j.pmatsci.2013.01.002

Cited by 485 publications

(338 citation statements)

References 380 publications

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“…3A). It is in accordance with the literature data 1,[32][33][34][35]44 . On the other hand, pore diameter increase with the electrolyte temperature is almost insignifi cant, probably due to the relatively short time of the anodization.…”

Section: -38supporting

confidence: 92%

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Fabrication and geometric characterization of highly-ordered hexagonally arranged arrays of nanoporous anodic alumina

Stępniowski

Nowak-Stępniowska

Michalska-Domańska

et al. 2014

Polish Journal of Chemical Technology

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Anodic aluminum oxide (AAO) has been fabricated in the 0.3 M oxalic acid at voltage range 20-60 V and temperature range of 35-50 o C. The resulting nanoporous alumina surfaces were characterized by high resolution scanning electron microscopy, and the images were quantitatively analysed by means of an innovative approach based on fast Fourier transform. The infl uence of operating anodization voltage and electrolyte temperature on nanopores geometry (pore diameter, interpore distance, porosity, pores density) and arrangement has been studied in details and compared to literature data and theoretical calculations. It was found that independently from the temperature, the best arrangement of the nanopores is for anodic aluminum oxide formed at voltages ranging from 40 to 50 V. Moreover, it was found that pore diameter and interpore distance increase linearly with voltage, what is in line with the literature data.

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Section: -38supporting

confidence: 92%

“…It consists of parallel, hexagonally arranged nanopores 1 . Nanoporous AAO serves very often as a template for nanofabrication and can be used in numerous applications such as: synthesis of nanowires 41 , propionic 41 , glycolic 41 and succinic 39, 41 acids were used.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and geometric characterization of highly-ordered hexagonally arranged arrays of nanoporous anodic alumina

Stępniowski

Nowak-Stępniowska

Michalska-Domańska

et al. 2014

Polish Journal of Chemical Technology

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“…Depending on anodising conditions, anodic coatings can reach 150 µm in thickness (A.M. Md Jani et al, 2013). Structural pores can be produced with diameters from 10 -400 nm with an interpore spacing of 50-600 nm.…”

Section: Introductionmentioning

confidence: 99%

Sample preparation of anodised aluminium oxide coatings for scanning electron microscopy

Long

Borissova

Wilson³

et al. 2017

Micron

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Sample preparation of anodised aluminium oxide coatings for scanning electron microscopy.Micron http://dx.doi.org/10.1016/j.micron. 2017.06.010 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Research Highlights Anodised aluminium oxide coating samples were prepared for SEM examination. Three preparation methods were trialled to assess coating thickness and structure. Cryogenic fracturing was found to be destructive to samples. Mechanical fracturing provided relatively accurate coating thickness measurements. Coating structure could only be evaluated from mechanically fractured samples. 2 AbstractCharacterisation of anodic aluminium oxide coatings and measurement of their thickness using microscopic techniques is valuable for analysing the effectiveness of the prior anodising process. Three different methods for preparing samples to view the coating cross-section (mechanical fracturing, cryogenic fracturing and metallography) were trialled and assessed for speed of implementation, simplicity and achievable measurement accuracy. Cryogenic fracturing was found to be destructive to samples. Mechanical fracturing yielded relatively accurate coating thickness measurements and coating structural information. Metallography provided the most accurate coating thickness measurement at the expense of coating structural information.

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“…(6) Owing to its high mechanical and chemical stability, AAO can also be utilized as a starting material in chemical sensors and humidity sensors by exploiting its porous structure. (7)(8)(9) The aluminum oxide film can also be fabricated by the sol-gel method, chemical vapor deposition, or thermal oxidation. (10,11) However, anodic oxidation is preferable because it is considerably less expensive, and a more controllable process.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Applied Vertical Magnetic Field on Anodizing Behavior of Aluminum to Produce Porous Anodic Aluminum Oxide

2016

Sensors and Materials

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Porous anodic aluminum oxide (AAO) film has potential to be a candidate material in nanofabrication, membranes, and humidity sensors. Anodic oxidation is typically preferred to fabricate AAO because it is an inexpensive and controllable process. In this study, a different approach to fabricating AAO by a single step anodizing in oxalic acid assisted by externally applied vertical magnetic field, is adopted. The anodizing experiments were conducted in 0.3 M oxalic acid aqueous solution as electrolyte. The vertical magnetic field was generated by a superconducting magnet with the range of 1 to 5 T. The results of the experiment showed that the magnetic field can promote the anodic dissolution of Al 3+ ions, and hence increase the AAO thickness by twice as much as without one. However, the pore diameter was decreased by the increased magnitude of the magnetic field. Interestingly, the AAO formed by anodizing with the vertical magnetic field showed a vertically aligned cylindrical structure of the pores. On the other hand, AAO formed by anodizing without the magnetic field showed random growth of pore structure. The density of AAO pores was also increased by the increase in magnitude of the magnetic field. The deep and straight structure with high density and porosity of AAO is advantageous for further application as template and sensor materials.

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Nanoporous anodic aluminium oxide: Advances in surface engineering and emerging applications

Cited by 485 publications

References 380 publications

Fabrication and geometric characterization of highly-ordered hexagonally arranged arrays of nanoporous anodic alumina

Fabrication and geometric characterization of highly-ordered hexagonally arranged arrays of nanoporous anodic alumina

Sample preparation of anodised aluminium oxide coatings for scanning electron microscopy

The Effect of Applied Vertical Magnetic Field on Anodizing Behavior of Aluminum to Produce Porous Anodic Aluminum Oxide

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