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Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application
In this paper, a periodic metallic–dielectric nanorod array which consists of Si nanorods coated with 30 nm Ag thin film set in a hexagonal configuration is fabricated and characterized. The fabrication procedure is performed by using nanosphere lithography with reactive ion etching, followed by Ag...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6956078/ https://www.ncbi.nlm.nih.gov/pubmed/31779222 http://dx.doi.org/10.3390/nano9121691 |
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author | Chou Chau, Yuan-Fong Chen, Kuan-Hung Chiang, Hai-Pang Lim, Chee Ming Huang, Hung Ji Lai, Chih-Hsien Kumara, N. T. R. N. |
author_facet | Chou Chau, Yuan-Fong Chen, Kuan-Hung Chiang, Hai-Pang Lim, Chee Ming Huang, Hung Ji Lai, Chih-Hsien Kumara, N. T. R. N. |
author_sort | Chou Chau, Yuan-Fong |
collection | PubMed |
description | In this paper, a periodic metallic–dielectric nanorod array which consists of Si nanorods coated with 30 nm Ag thin film set in a hexagonal configuration is fabricated and characterized. The fabrication procedure is performed by using nanosphere lithography with reactive ion etching, followed by Ag thin-film deposition. The mechanism of the surface and gap plasmon modes supported by the fabricated structure is numerically demonstrated by the three-dimensional finite element method. The measured and simulated absorptance spectra are observed to have a same trend and a qualitative fit. Our fabricated plasmonic sensor shows an average sensitivity of 340.0 nm/RIU when applied to a refractive index sensor ranging from 1.0 to 1.6. The proposed substrates provide a practical plasmonic nanorod-based sensing platform, and the fabrication methods used are technically effective and low-cost. |
format | Online Article Text |
id | pubmed-6956078 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-69560782020-01-23 Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application Chou Chau, Yuan-Fong Chen, Kuan-Hung Chiang, Hai-Pang Lim, Chee Ming Huang, Hung Ji Lai, Chih-Hsien Kumara, N. T. R. N. Nanomaterials (Basel) Article In this paper, a periodic metallic–dielectric nanorod array which consists of Si nanorods coated with 30 nm Ag thin film set in a hexagonal configuration is fabricated and characterized. The fabrication procedure is performed by using nanosphere lithography with reactive ion etching, followed by Ag thin-film deposition. The mechanism of the surface and gap plasmon modes supported by the fabricated structure is numerically demonstrated by the three-dimensional finite element method. The measured and simulated absorptance spectra are observed to have a same trend and a qualitative fit. Our fabricated plasmonic sensor shows an average sensitivity of 340.0 nm/RIU when applied to a refractive index sensor ranging from 1.0 to 1.6. The proposed substrates provide a practical plasmonic nanorod-based sensing platform, and the fabrication methods used are technically effective and low-cost. MDPI 2019-11-26 /pmc/articles/PMC6956078/ /pubmed/31779222 http://dx.doi.org/10.3390/nano9121691 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 Chou Chau, Yuan-Fong Chen, Kuan-Hung Chiang, Hai-Pang Lim, Chee Ming Huang, Hung Ji Lai, Chih-Hsien Kumara, N. T. R. N. Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application |
title | Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application |
title_full | Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application |
title_fullStr | Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application |
title_full_unstemmed | Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application |
title_short | Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application |
title_sort | fabrication and characterization of a metallic–dielectric nanorod array by nanosphere lithography for plasmonic sensing application |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6956078/ https://www.ncbi.nlm.nih.gov/pubmed/31779222 http://dx.doi.org/10.3390/nano9121691 |
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