Porosity and hole diameter tuning on nanoporous anodic aluminium oxide membranes by one-step anodization

Ugochi K. Chime; Fabian I. Ezema; Jose Marques-Hueso

doi:10.1016/j.ijleo.2018.08.109

Porosity and hole diameter tuning on nanoporous anodic aluminium oxide membranes by one-step anodization

Ugochi K. Chime, Fabian I. Ezema, Jose Marques-Hueso^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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Abstract

Nanoporous Aluminium (III) oxide was fabricated and characterized to determine its suitability as a microfiltration membrane and an antireflection coating. Aluminium (III) oxides were obtained using a one-step anodization process with Phosphoric acid (H₃PO₄) as electrolyte. The effect of the anodization voltage and electrolyte concentration were studied. Semi-ordered nanotubes were observed using a Scanning Electron Microscope. Porosity, pore diameter and interpore distance were obtained and were found to increase with an increase in anodization voltage. While the pore diameter and porosity increased with an increase in electrolyte concentration, the interpore distance was found to remain stable. The porosity was found to vary from 16% to 28% in the investigated range of parameters, while the pore diameter varied from 120 to 178 nm. Reflectance curves showed a wide range of low reflectance in the visible light region, which validates their applicability in the field of anti-reflection coatings.

Original language	English
Pages (from-to)	558-562
Number of pages	5
Journal	Optik
Volume	174
Early online date	8 Dec 2018
DOIs	https://doi.org/10.1016/j.ijleo.2018.08.109
Publication status	Published - Dec 2018

Keywords

Alumina nanotubes
Anodization
Anti-reflection coating
Microfiltration membranes
Phosphoric acid electrolyte

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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title = "Porosity and hole diameter tuning on nanoporous anodic aluminium oxide membranes by one-step anodization",

abstract = "Nanoporous Aluminium (III) oxide was fabricated and characterized to determine its suitability as a microfiltration membrane and an antireflection coating. Aluminium (III) oxides were obtained using a one-step anodization process with Phosphoric acid (H3PO4) as electrolyte. The effect of the anodization voltage and electrolyte concentration were studied. Semi-ordered nanotubes were observed using a Scanning Electron Microscope. Porosity, pore diameter and interpore distance were obtained and were found to increase with an increase in anodization voltage. While the pore diameter and porosity increased with an increase in electrolyte concentration, the interpore distance was found to remain stable. The porosity was found to vary from 16% to 28% in the investigated range of parameters, while the pore diameter varied from 120 to 178 nm. Reflectance curves showed a wide range of low reflectance in the visible light region, which validates their applicability in the field of anti-reflection coatings.",

keywords = "Alumina nanotubes, Anodization, Anti-reflection coating, Microfiltration membranes, Phosphoric acid electrolyte",

author = "Chime, {Ugochi K.} and Ezema, {Fabian I.} and Jose Marques-Hueso",

year = "2018",

month = dec,

doi = "10.1016/j.ijleo.2018.08.109",

language = "English",

volume = "174",

pages = "558--562",

journal = "Optik",

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T1 - Porosity and hole diameter tuning on nanoporous anodic aluminium oxide membranes by one-step anodization

AU - Chime, Ugochi K.

AU - Ezema, Fabian I.

AU - Marques-Hueso, Jose

PY - 2018/12

Y1 - 2018/12

N2 - Nanoporous Aluminium (III) oxide was fabricated and characterized to determine its suitability as a microfiltration membrane and an antireflection coating. Aluminium (III) oxides were obtained using a one-step anodization process with Phosphoric acid (H3PO4) as electrolyte. The effect of the anodization voltage and electrolyte concentration were studied. Semi-ordered nanotubes were observed using a Scanning Electron Microscope. Porosity, pore diameter and interpore distance were obtained and were found to increase with an increase in anodization voltage. While the pore diameter and porosity increased with an increase in electrolyte concentration, the interpore distance was found to remain stable. The porosity was found to vary from 16% to 28% in the investigated range of parameters, while the pore diameter varied from 120 to 178 nm. Reflectance curves showed a wide range of low reflectance in the visible light region, which validates their applicability in the field of anti-reflection coatings.

AB - Nanoporous Aluminium (III) oxide was fabricated and characterized to determine its suitability as a microfiltration membrane and an antireflection coating. Aluminium (III) oxides were obtained using a one-step anodization process with Phosphoric acid (H3PO4) as electrolyte. The effect of the anodization voltage and electrolyte concentration were studied. Semi-ordered nanotubes were observed using a Scanning Electron Microscope. Porosity, pore diameter and interpore distance were obtained and were found to increase with an increase in anodization voltage. While the pore diameter and porosity increased with an increase in electrolyte concentration, the interpore distance was found to remain stable. The porosity was found to vary from 16% to 28% in the investigated range of parameters, while the pore diameter varied from 120 to 178 nm. Reflectance curves showed a wide range of low reflectance in the visible light region, which validates their applicability in the field of anti-reflection coatings.

KW - Alumina nanotubes

KW - Anodization

KW - Anti-reflection coating

KW - Microfiltration membranes

KW - Phosphoric acid electrolyte

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U2 - 10.1016/j.ijleo.2018.08.109

DO - 10.1016/j.ijleo.2018.08.109

M3 - Article

AN - SCOPUS:85052724154

SN - 0030-4026

VL - 174

SP - 558

EP - 562

JO - Optik

JF - Optik

ER -

Porosity and hole diameter tuning on nanoporous anodic aluminium oxide membranes by one-step anodization

Abstract

Keywords

ASJC Scopus subject areas

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