Improvement of sensitivity in an interferometry by controlling pore size on the anodic aluminum oxide chip pore-widening technique

AbstractPorous anodic aluminum oxide membranes were fabricated via two-step anodization of aluminum in 0.3 M H2C2O4, 0.3 M H2SO4 and 0.17 M H3PO4 solutions. The parameters of the oxide film such as: pore diameter (Dp), interpore distance (Dc), porosity (P) and pore density (ρ) can be completely controlled by the operating conditions of the anodization. Additionally, the pore diameters and pore density can be controlled via a chemical treatment (pore opening/widening process). The effect of anodizing conditions such as the applied voltage, type of electrolyte and purity of the substrate on the rate of porous oxide growth are discussed. The obtained results were compared with the theoretical predictions and data that has been reported in the literature. The influence of the duration of chemical etching on the structural features of the oxide membranes was studied. On the based on qualitative and quantitative FFT analyzes and circularity maps, it was found that the nanostructures of anodized aluminum have the maximum order under certain specified conditions. The presence of alloying elements affects not only the rate of oxide growth but also the morphology of the anodic aluminum oxide. The rate of oxide growth depends on the electrolyte type and temperature. During chemical treatment of the oxide films pore diameter increases with the pore widening time and the highest pore widening was observed in phosphoric acid solution.

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Effects of particle size, concentration and pore size on the loading density of silica nanoparticle monolayer arrays on anodic aluminum oxide substrates prepared by the spin-coating method

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2021.125465 ◽

2021 ◽

pp. 125465

Author(s):

Kazutoshi Sekiguchi ◽

Ken-ichi Katsumata ◽

Hiroyo Segawa ◽

Takayuki Nakanishi ◽

Atsuo Yasumori

Keyword(s):

Particle Size ◽

Aluminum Oxide ◽

Pore Size ◽

Spin Coating ◽

Anodic Aluminum Oxide ◽

Silica Nanoparticle ◽

Spin Coating Method ◽

Anodic Aluminum ◽

Oxide Substrates ◽

Coating Method

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Pore-widening with the assistance of ultrasonic: A novel process for preparing porous anodic aluminum oxide membrane

Materials Letters ◽

10.1016/j.matlet.2005.12.080 ◽

2006 ◽

Vol 60 (17-18) ◽

pp. 2098-2100 ◽

Cited By ~ 4

Author(s):

Min Tang ◽

Jianping He ◽

Jianhua Zhou ◽

Ping He

Keyword(s):

Aluminum Oxide ◽

Anodic Aluminum Oxide ◽

Porous Anodic Aluminum Oxide ◽

Anodic Aluminum Oxide Membrane ◽

Anodic Aluminum ◽

Pore Widening ◽

Oxide Membrane

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Effect of Formation Voltage on the Pore Size of Porous Anodic Aluminum Oxide

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/599/1/012007 ◽

2019 ◽

Vol 599 ◽

pp. 012007

Author(s):

Manogari Sianturi ◽

Ariadne L Juwono ◽

Anawati Anawati

Keyword(s):

Aluminum Oxide ◽

Pore Size ◽

Anodic Aluminum Oxide ◽

Porous Anodic Aluminum Oxide ◽

Anodic Aluminum

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Anodic Aluminum Oxide (AAO) Membranes for Neurite Outgrowth

MRS Proceedings ◽

10.1557/opl.2012.1652 ◽

2012 ◽

Vol 1498 ◽

pp. 97-102 ◽

Cited By ~ 2

Author(s):

Meghan E. Casey ◽

Anthony P. Ventura ◽

Wojciech Z. Misiolek ◽

Sabrina Jedlicka

Keyword(s):

Aluminum Oxide ◽

Pore Size ◽

Neurite Outgrowth ◽

Anodic Aluminum Oxide ◽

Cellular Growth ◽

Anodic Aluminum ◽

Cell Counts ◽

Size And Morphology ◽

Imagej Software

ABSTRACTAnodic aluminum oxide (AAO) membranes were fabricated in a mild two-step anodization procedure. The voltage was varied during both anodization steps to control the pore size and morphology of the AAO membranes. Pore sizes ranged from 34 nm to 117 nm. Characterization of the pore structure was performed by scanning electron microscopy (SEM). To assess the potential of the AAO membranes as a neuronal differentiation platform, C17.2 neural stem cells (NSCs), an immortalized and multipotent cell line, were used. The NSCs were forced to differentiate via serum-withdrawal. Cellular growth was characterized by immunocytochemistry (ICC) and SEM. ImageJ software was used to obtain phenotypic cell counts and neurite outgrowth lengths. Results indicate a highly tunable correlation between AAO nanopore sizes and differentiated cell populations. By selecting AAO membranes with specific pore size ranges, control of neuronal network density and neurite outgrowth length was achieved.

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Characterization of the Nanoporous Template Using Anodic Alumina Method

Journal of Nanomaterials ◽

10.1155/2014/130716 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 7

Author(s):

Mau-Phon Houng ◽

Wei-Lun Lu ◽

Tsung-Hsin Yang ◽

Kuan-Wei Lee

Keyword(s):

Aluminum Oxide ◽

Anodic Aluminum Oxide ◽

Glass Structure ◽

Aao Template ◽

Applied Bias ◽

Anodic Aluminum ◽

Pore Widening ◽

Nanoporous Template ◽

Ito Glass

Porous anodic aluminum oxide (AAO) is deposited on a 5 cm × 5 cm tin-doped indium oxide (ITO)/glass substrate, and the AAO/ITO/glass structure thus formed is used to reduce the amount of unreacted Al inside the AAO template, thereby reducing the transmittance of the AAO/glass structure. The enhancement of transmittance is achieved by modulating the diameter of the pores and varying the applied bias. The proposed AAO can be used at a high applied bias (up to 120 V) to improve the uniformity of the current density. Following pore-widening treatment and posttreatment annealing, the morphologies and transmittance of the AAO/ITO/glass structure were also investigated.

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