Room Temperature Anodization Of Aluminum And The Effect Of The Electrochemical Cell In The Formation Of Porous Alumina Films From Acid And Alkaline Electrolytes

Araoyinbo, Alaba O.

doi:10.5185/amlett.2012.2323

Cited by 17 publications

(7 citation statements)

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“…Nanoporous alumina pore diameters can be increased after the anodization process with the use of a suitable The pores were observed to increase significantly due to the presence of the H + ion in the aqueous solution [7]. The use of a mild etchant which can be easily controlled enables the possibility of having a controlled pore size suitable for the different area of applications.…”

Section: Power Regulating Devicementioning

confidence: 99%

“…Anodic aluminum oxide (AAO) has always been a template of choice over the years because it is chemically stable, easy to prepare and fabricate, biologically inert and can withstand fairly high temperature [1-5], have found use in different areas that includes magnetic, optical, and electronic devices [6]. The anodization process could be by a single step anodization process [7,8]; two steps anodization process [9-11]; or three steps anodization process [12] have all been reported to obtain disordered and/or ordered nanoporous alumina. Most of the reported operating conditions for the anodization of the aluminum foil have been limited to the freezing of the electrolyte bath despite the prediction by Gibbs standard state free energy of room and higher temperatures to be more favorable.…”

Section: Introductionmentioning

confidence: 99%

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Using Gibbs Standard State Free Energy And A Power Regulating Device To Predict And Control The Fabrication Of Nanoporous Alumina

Araoyinbo¹,

Rahmat²,

Derman³

et al. 2013

Adv. Mater. Lett.

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The basic concept of Gibbs standard state free energy predicts a favorable condition for both room and high temperature fabrication of nanoporous alumina in phosphoric acid electrolyte. The anodization of aluminum foil in acidic electrolytes is made possible by the well known process parameters that have been studied over the years. These parameters i.e. voltage, current density, type of electrolyte etc have been very effective when anodizing aluminum at freezing temperatures. When the operating temperature is raised above the freezing temperature, additional process parameters would be required to make the pore formation possible. The fabrication of the aluminum foil was carried out using phosphoric acid as the electrolyte source. The electrolyte pH was adjusted to 1, 3 and 5 in order to simulate different anodizing conditions. A potential of 50 V from a dc power supply was applied across the electrochemical cell, while a power regulating device with different power rating was attached to the electrochemical cell to provide the operating system with additional parameters that could influence the surface structure of the alumina. The micrographs obtained show that the propagation and growth of the pores at both room and high temperatures was made possible by the power regulating device attached to the cell.

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Section: Power Regulating Devicementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Using Gibbs Standard State Free Energy And A Power Regulating Device To Predict And Control The Fabrication Of Nanoporous Alumina

Araoyinbo¹,

Rahmat²,

Derman³

et al. 2013

Adv. Mater. Lett.

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“…Among the mentioned methods, anodizing has long been considered as one of the most promising methods for fabricating self-ordered structure due to the controllability of the roughness dimensions besides the enhancement in corrosion and mechanical behavior [26]. Different parameters play role in the anodizing process, such as anodizing voltage, time, electrolyte, and temperature; each was studied extensively by many researchers [19,27,28].…”

Section: Introductionmentioning

confidence: 99%

Mechanically stable superhydrophobic nanostructured aluminum mesh with reduced water surface friction

et al. 2021

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Superhydrophobic surfaces demonstrate significant characteristics which make them suitable for a wide variety of applications. In this study, we propose a facile, one-step, and cost-effective anodizing scheme using aluminum nitrate/stearic acid mixture solution to create a superhydrophobic surface on an aluminum mesh. The surface outperforms the surface anodized by the widely used oxalic acid solution in terms of superhydrophobicity and water-surface friction behavior. The proposed surface reduced the friction by 11% on average respective to the surface prepared by oxalic acid. The durability of the introduced superhydrophobic surface has also been investigated. The proposed surface retained its high water contact angle and showed higher hydrophobicity relative to the surface anodized by oxalic acid after ten abrasion cycles. This method and surface may be used for numerous applications due to its ease of fabrication, low cost, and excellent performance in energy-loss reduction.

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“…Los métodos más caros emplean ánodos de aluminio de alta pureza (≥99.995%), electrodos de referencia, atmósferas inertes y criostatos para controlar la temperatura cerca de cero grados Celsius [5,[14][15][16][17][18][19][20][21]. Los métodos más baratos se implementan sustituyendo Al de alta pureza por aluminio comercial (≤99.5%, o de baja pureza), reemplazando el criostato por equipamiento artesanal desarrollado en el laboratorio y eliminando el uso de atmósferas inertes [22][23][24][25][26][27]. Estas simplificaciones al proceso de obtención de películas PAA deben hacerse teniendo en cuenta el compromiso existente entre abaratar costos y lograr un molde con la morfología adecuada para crecer nanohilos.…”

Section: Introductionunclassified

Fabricación de alúmina anódica porosa de bajo costo: Un estudio comparativo de la morfología producida por uno y dos pasos de anodizado

et al. 2016

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RESUMEN Se describe un método simple y barato para la fabricación de moldes de alúmina nanoporosa, con potenciales aplicaciones para la fabricación de nanohilos. Se utiliza como materia prima un aluminio de grado comercial. Los moldes nanoporosos fabricados tienen un diámetro promedio de poros de (20 ± 4) nm. El proceso de fabricación consta de dos etapas de anodizado. Se detallan ambas etapas de anodizado y se caracteriza el material que se obtiene como resultado de cada una de ellas. Los moldes nanoporosos obtenidos con dos pasos de anodizado tienen la distribución más estrecha de tamaño de poros, mejor circularidad y orden espacial. En dichos moldes se crecen nanohilos a base de ferrita de cobalto (CoFe2O4). Para hacerlo, se usa un método simple y un equipamiento sencillo. Mediante microscopía electrónica se hace una caracterización morfológica de las plantillas y de los nanohilos obtenidos.

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Room Temperature Anodization Of Aluminum And The Effect Of The Electrochemical Cell In The Formation Of Porous Alumina Films From Acid And Alkaline Electrolytes

Cited by 17 publications

References 1 publication

Using Gibbs Standard State Free Energy And A Power Regulating Device To Predict And Control The Fabrication Of Nanoporous Alumina

Using Gibbs Standard State Free Energy And A Power Regulating Device To Predict And Control The Fabrication Of Nanoporous Alumina

Mechanically stable superhydrophobic nanostructured aluminum mesh with reduced water surface friction

Fabricación de alúmina anódica porosa de bajo costo: Un estudio comparativo de la morfología producida por uno y dos pasos de anodizado

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