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High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications

This study demonstrates a new, robust, and accessible deposition technique of metal nanoparticle arrays (NPAs), which uses nanoporous anodic alumina (NAA) as a template for capillary force-assisted convective colloid (40, 60, and 80 nm diameter Au) assembly. The NPA density and nanoparticle size can...

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Autores principales: Malinovskis, Uldis, Poplausks, Raimonds, Erts, Donats, Ramser, Kerstin, Tamulevičius, Sigitas, Tamulevičienė, Asta, Gu, Yesong, Prikulis, Juris
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6523383/
https://www.ncbi.nlm.nih.gov/pubmed/30987127
http://dx.doi.org/10.3390/nano9040531
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author Malinovskis, Uldis
Poplausks, Raimonds
Erts, Donats
Ramser, Kerstin
Tamulevičius, Sigitas
Tamulevičienė, Asta
Gu, Yesong
Prikulis, Juris
author_facet Malinovskis, Uldis
Poplausks, Raimonds
Erts, Donats
Ramser, Kerstin
Tamulevičius, Sigitas
Tamulevičienė, Asta
Gu, Yesong
Prikulis, Juris
author_sort Malinovskis, Uldis
collection PubMed
description This study demonstrates a new, robust, and accessible deposition technique of metal nanoparticle arrays (NPAs), which uses nanoporous anodic alumina (NAA) as a template for capillary force-assisted convective colloid (40, 60, and 80 nm diameter Au) assembly. The NPA density and nanoparticle size can be independently tuned by the anodization conditions and colloid synthesis protocols. This enables production of non-touching variable-density NPAs with controllable gaps in the 20–60 nm range. The NPA nearest neighbor center distance in the present study was fixed to 100 nm by the choice of anodization protocol. The obtained Au NPAs have the resonant scattering maxima in the visible spectral range, with a refractometric sensitivity, which can be tuned by the variation of the array density. The thickness of the NAA layer in an Aluminum-NAA-NPA multilayer system enables further tuning of the resonance frequency and optimization for use with specific molecules, e.g., to avoid absorption bands. Applicability of the mentioned multilayers for colorimetric refractive index (RI) sensing is demonstrated. Their use as Surface-Enhanced Raman Scattering (SERS) substrates is tested using hemoglobin as a biological probe molecule.
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spelling pubmed-65233832019-06-03 High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications Malinovskis, Uldis Poplausks, Raimonds Erts, Donats Ramser, Kerstin Tamulevičius, Sigitas Tamulevičienė, Asta Gu, Yesong Prikulis, Juris Nanomaterials (Basel) Article This study demonstrates a new, robust, and accessible deposition technique of metal nanoparticle arrays (NPAs), which uses nanoporous anodic alumina (NAA) as a template for capillary force-assisted convective colloid (40, 60, and 80 nm diameter Au) assembly. The NPA density and nanoparticle size can be independently tuned by the anodization conditions and colloid synthesis protocols. This enables production of non-touching variable-density NPAs with controllable gaps in the 20–60 nm range. The NPA nearest neighbor center distance in the present study was fixed to 100 nm by the choice of anodization protocol. The obtained Au NPAs have the resonant scattering maxima in the visible spectral range, with a refractometric sensitivity, which can be tuned by the variation of the array density. The thickness of the NAA layer in an Aluminum-NAA-NPA multilayer system enables further tuning of the resonance frequency and optimization for use with specific molecules, e.g., to avoid absorption bands. Applicability of the mentioned multilayers for colorimetric refractive index (RI) sensing is demonstrated. Their use as Surface-Enhanced Raman Scattering (SERS) substrates is tested using hemoglobin as a biological probe molecule. MDPI 2019-04-03 /pmc/articles/PMC6523383/ /pubmed/30987127 http://dx.doi.org/10.3390/nano9040531 Text en © 2019 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Malinovskis, Uldis
Poplausks, Raimonds
Erts, Donats
Ramser, Kerstin
Tamulevičius, Sigitas
Tamulevičienė, Asta
Gu, Yesong
Prikulis, Juris
High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications
title High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications
title_full High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications
title_fullStr High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications
title_full_unstemmed High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications
title_short High-Density Plasmonic Nanoparticle Arrays Deposited on Nanoporous Anodic Alumina Templates for Optical Sensor Applications
title_sort high-density plasmonic nanoparticle arrays deposited on nanoporous anodic alumina templates for optical sensor applications
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6523383/
https://www.ncbi.nlm.nih.gov/pubmed/30987127
http://dx.doi.org/10.3390/nano9040531
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