Modeling and optimization of characterization of nanostructure anodized aluminium oxide membranes

Azami, Hamed; Omidkhah, Mohammadreza

doi:10.1007/s13738-018-01574-2

Cited by 6 publications

(4 citation statements)

References 48 publications

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“…AAO gradually grows in acidic solutions that anodize aluminum under an electric field between the anode and the cathode. The diameter of AAO pores depends on the anodization potential (voltage), temperature, electrolyte, and concentration [29,30]. The pore diameter and the distance between the pores often increase as the anodization voltage or the electrolyte concentration increases [14,31,32].…”

Section: Introductionmentioning

confidence: 99%

Development and Analysis of Electrochemical Reactor with Vibrating Functional Element for AAO Nanoporous Membranes Fabrication

Cigane

Palevičius

Jurenas

et al. 2022

Sensors

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Nanoporous anodic aluminum oxide (AAO) is needed for a variety of purposes due to its unique properties, including high hardness, thermal stability, large surface area, and light weight. Nevertheless, the use of AAO in different applications is limited because of its brittleness. A new design of an electrochemical reactor with a vibrating element for AAO nanoporous membranes fabrication is proposed. The vibrating element in the form of a piezoceramic ring was installed inside the developed reactor, which allows to create a high-frequency excitation. Furthermore, mixing and vibration simulations in the novel reactor were carried out using ANSYS 17 and COMSOL Multiphysics 5.4 software, respectively. By theoretical calculations, the possibility to excite the vibrations of five resonant modes at different frequencies in the AAO membrane was shown. The theoretical results were experimentally confirmed. Five vibration modes at close to the theoretical frequencies were obtained in the novel reactor. Moreover, nanoporous AAO membranes were synthesized. The novel aluminum anodization technology results in AAO membranes with 82.6 ± 10 nm pore diameters and 43% porosity at 3.1 kHz frequency excitation and AAO membranes with 86.1 ± 10 nm pore diameters and 46% porosity at 4.1 kHz frequency excitation. Furthermore, the chemical composition of the membrane remained unchanged, and the hardness decreased. Nanoporous AAO has become less brittle but hard enough to be used for template synthesis.

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Section: Introductionmentioning

confidence: 99%

Development and Analysis of Electrochemical Reactor with Vibrating Functional Element for AAO Nanoporous Membranes Fabrication

Cigane

Palevičius

Jurenas

et al. 2022

Sensors

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“…Taking chip design for example, we need to iteratively select chip cells from a pool of cells and place them in appropriate positions onto a chip canvas to obtain a chip of high quality in the end as described by Mirhoseini et al (2020). Current practises in these areas have relied heavily on human domain expertise, as a result, these approaches could be expensive (i.e., requiring highly specialized skills), inefficient (i.e., throughput bottlenecked by the availability of human experts as well as their latency), ineffective (i.e., quality depends entirely on the expertise level of human designers and is often hard to control or to further optimize), and difficult to scale (i.e., solutions are often case specific, not easily transferable or automatable) as done in works (Liwo et al, 1999;Azami and Omidkhah, 2019;Kalinli, 2004;Kool et al, 2019). The recent work of Vinyals et al (2015a) suggests a promising new direction of using data-driven approach to tackle this challenging problem automatically using machine learning.…”

Section: Introductionmentioning

confidence: 99%

An integrated deep-learning and geometric approach to 1D barcode

Xiao

Jiang

2019

Fourth International Workshop on Pattern Recognition

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Finding optimal configurations in a geometric space is a key challenge in many technological disciplines. Current approaches either rely heavily on human domain expertise and are difficult to scale. In this paper we show it is possible to solve configuration optimization problems for whole-page recommendation using reinforcement learning. The proposed Tile Networks is a neural architecture that optimizes 2D geometric configurations by arranging items on proper positions. Empirical results on real dataset demonstrate its superior performance compared to traditional learning to rank approaches and recent deep models.

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confidence: 99%

Vibration Analysis of Nanoporous AAO Membrane by Using High-Frequency Excitation Technique in Electrochemical Reactor

Cigane¹,

Palevičius²

2023

World Congress on Recent Advances in Nanotechnology

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This article describes the research and development of nanoporous anodic aluminum oxide (AAO) membrane fabrication technology. There are many studies in the literature that analyse the dependence of the pore geometry of AAO on various parameters such as anodization time, temperature, type of electrolyte, concentration, etc [1][2][3][4]. However, control of the geometry of AAO nanopores using high-frequency excitation techniques during the anodization process is in the early stages of research, so no dependence has been established yet. Therefore, this paper presents a high-frequency excitation technique and a novel design of the electrochemical reactor that is designed to control the geometry of nanosized pores.Vibrations in the electrochemical reactor can be achieved using a piezoelectric ceramic material such as lead zirconate titanate (PZT), which has good electromechanical properties and can be used in the development of various devices [5]. An electrochemical reactor was developed to combine two processes (anodization and high-frequency excitation) in one technology.The theoretical and experimental results of the vibration analysis confirm that the developed electrochemical reactor can use the high-frequency excitation technique during the two-step anodization process. Using a precise real-time instrument for surface measurement (PRISM) holography system (Hytec, USA) [6], five resonant modes of different frequencies (from 2.2 to 10.7 kHz) have been achieved in the novel reactor. Moreover, AAO membranes were synthesized. The pore diameters were found between 28-96 nm. The results of this study reveal that the innovative electrochemical reactor meets the synthesis criteria and is suitable for the fabrication of nanopores.The results of this study will greatly contribute to the research and development of better quality nanoporous AAO membranes. Therefore, more research should focus on nanoporous AAO membrane fabrication by using the high-frequency excitation technique to find the dependence of the nanopore geometry at different frequencies.

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Modeling and optimization of characterization of nanostructure anodized aluminium oxide membranes

Cited by 6 publications

References 48 publications

Development and Analysis of Electrochemical Reactor with Vibrating Functional Element for AAO Nanoporous Membranes Fabrication

Development and Analysis of Electrochemical Reactor with Vibrating Functional Element for AAO Nanoporous Membranes Fabrication

An integrated deep-learning and geometric approach to 1D barcode

Vibration Analysis of Nanoporous AAO Membrane by Using High-Frequency Excitation Technique in Electrochemical Reactor

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