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Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications
Modifying the diameter of the pores in nanoporous anodic alumina opens new possibilities in the application of this material. In this work, we review the different nanoengineering methods by classifying them into two kinds: in situ and ex situ. Ex situ methods imply the interruption of the anodizati...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455819/ https://www.ncbi.nlm.nih.gov/pubmed/28788127 http://dx.doi.org/10.3390/ma7075225 |
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author | Ferré-Borrull, Josep Pallarès, Josep Macías, Gerard Marsal, Lluis F. |
author_facet | Ferré-Borrull, Josep Pallarès, Josep Macías, Gerard Marsal, Lluis F. |
author_sort | Ferré-Borrull, Josep |
collection | PubMed |
description | Modifying the diameter of the pores in nanoporous anodic alumina opens new possibilities in the application of this material. In this work, we review the different nanoengineering methods by classifying them into two kinds: in situ and ex situ. Ex situ methods imply the interruption of the anodization process and the addition of intermediate steps, while in situ methods aim at realizing the in-depth pore modulation by continuous changes in the anodization conditions. Ex situ methods permit a greater versatility in the pore geometry, while in situ methods are simpler and adequate for repeated cycles. As an example of ex situ methods, we analyze the effect of changing drastically one of the anodization parameters (anodization voltage, electrolyte composition or concentration). We also introduce in situ methods to obtain distributed Bragg reflectors or rugate filters in nanoporous anodic alumina with cyclic anodization voltage or current. This nanopore engineering permits us to propose new applications in the field of biosensing: using the unique reflectance or photoluminescence properties of the material to obtain photonic barcodes, applying a gold-coated double-layer nanoporous alumina to design a self-referencing protein sensor or giving a proof-of-concept of the refractive index sensing capabilities of nanoporous rugate filters. |
format | Online Article Text |
id | pubmed-5455819 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-54558192017-07-28 Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications Ferré-Borrull, Josep Pallarès, Josep Macías, Gerard Marsal, Lluis F. Materials (Basel) Review Modifying the diameter of the pores in nanoporous anodic alumina opens new possibilities in the application of this material. In this work, we review the different nanoengineering methods by classifying them into two kinds: in situ and ex situ. Ex situ methods imply the interruption of the anodization process and the addition of intermediate steps, while in situ methods aim at realizing the in-depth pore modulation by continuous changes in the anodization conditions. Ex situ methods permit a greater versatility in the pore geometry, while in situ methods are simpler and adequate for repeated cycles. As an example of ex situ methods, we analyze the effect of changing drastically one of the anodization parameters (anodization voltage, electrolyte composition or concentration). We also introduce in situ methods to obtain distributed Bragg reflectors or rugate filters in nanoporous anodic alumina with cyclic anodization voltage or current. This nanopore engineering permits us to propose new applications in the field of biosensing: using the unique reflectance or photoluminescence properties of the material to obtain photonic barcodes, applying a gold-coated double-layer nanoporous alumina to design a self-referencing protein sensor or giving a proof-of-concept of the refractive index sensing capabilities of nanoporous rugate filters. MDPI 2014-07-18 /pmc/articles/PMC5455819/ /pubmed/28788127 http://dx.doi.org/10.3390/ma7075225 Text en © 2014 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Review Ferré-Borrull, Josep Pallarès, Josep Macías, Gerard Marsal, Lluis F. Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications |
title | Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications |
title_full | Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications |
title_fullStr | Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications |
title_full_unstemmed | Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications |
title_short | Nanostructural Engineering of Nanoporous Anodic Alumina for Biosensing Applications |
title_sort | nanostructural engineering of nanoporous anodic alumina for biosensing applications |
topic | Review |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455819/ https://www.ncbi.nlm.nih.gov/pubmed/28788127 http://dx.doi.org/10.3390/ma7075225 |
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