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Silver nanowires with optimized silica coating as versatile plasmonic resonators
Metal nanoparticles are the most frequently used nanostructures in plasmonics. However, besides nanoparticles, metal nanowires feature several advantages for applications. Their elongation offers a larger interaction volume, their resonances can reach higher quality factors, and their mode structure...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6405757/ https://www.ncbi.nlm.nih.gov/pubmed/30846736 http://dx.doi.org/10.1038/s41598-019-40380-5 |
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author | Rothe, Martin Zhao, Yuhang Kewes, Günter Kochovski, Zdravko Sigle, Wilfried van Aken, Peter A. Koch, Christoph Ballauff, Matthias Lu, Yan Benson, Oliver |
author_facet | Rothe, Martin Zhao, Yuhang Kewes, Günter Kochovski, Zdravko Sigle, Wilfried van Aken, Peter A. Koch, Christoph Ballauff, Matthias Lu, Yan Benson, Oliver |
author_sort | Rothe, Martin |
collection | PubMed |
description | Metal nanoparticles are the most frequently used nanostructures in plasmonics. However, besides nanoparticles, metal nanowires feature several advantages for applications. Their elongation offers a larger interaction volume, their resonances can reach higher quality factors, and their mode structure provides better coupling into integrated hybrid dielectric-plasmonic circuits. It is crucial though, to control the distance of the wire to a supporting substrate, to another metal layer or to active materials with sub-nanometer precision. A dielectric coating can be utilized for distance control, but it must not degrade the plasmonic properties. In this paper, we introduce a controlled synthesis and coating approach for silver nanowires to fulfill these demands. We synthesize and characterize silver nanowires of around 70 nm in diameter. These nanowires are coated with nm-sized silica shells using a modified Stöber method to achieve a homogeneous and smooth surface quality. We use transmission electron microscopy, dark-field microscopy and electron-energy loss spectroscopy to study morphology and plasmonic resonances of individual nanowires and quantify the influence of the silica coating. Thorough numerical simulations support the experimental findings showing that the coating does not deteriorate the plasmonic properties and thus introduce silver nanowires as usable building blocks for integrated hybrid plasmonic systems. |
format | Online Article Text |
id | pubmed-6405757 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-64057572019-03-11 Silver nanowires with optimized silica coating as versatile plasmonic resonators Rothe, Martin Zhao, Yuhang Kewes, Günter Kochovski, Zdravko Sigle, Wilfried van Aken, Peter A. Koch, Christoph Ballauff, Matthias Lu, Yan Benson, Oliver Sci Rep Article Metal nanoparticles are the most frequently used nanostructures in plasmonics. However, besides nanoparticles, metal nanowires feature several advantages for applications. Their elongation offers a larger interaction volume, their resonances can reach higher quality factors, and their mode structure provides better coupling into integrated hybrid dielectric-plasmonic circuits. It is crucial though, to control the distance of the wire to a supporting substrate, to another metal layer or to active materials with sub-nanometer precision. A dielectric coating can be utilized for distance control, but it must not degrade the plasmonic properties. In this paper, we introduce a controlled synthesis and coating approach for silver nanowires to fulfill these demands. We synthesize and characterize silver nanowires of around 70 nm in diameter. These nanowires are coated with nm-sized silica shells using a modified Stöber method to achieve a homogeneous and smooth surface quality. We use transmission electron microscopy, dark-field microscopy and electron-energy loss spectroscopy to study morphology and plasmonic resonances of individual nanowires and quantify the influence of the silica coating. Thorough numerical simulations support the experimental findings showing that the coating does not deteriorate the plasmonic properties and thus introduce silver nanowires as usable building blocks for integrated hybrid plasmonic systems. Nature Publishing Group UK 2019-03-07 /pmc/articles/PMC6405757/ /pubmed/30846736 http://dx.doi.org/10.1038/s41598-019-40380-5 Text en © The Author(s) 2019 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Rothe, Martin Zhao, Yuhang Kewes, Günter Kochovski, Zdravko Sigle, Wilfried van Aken, Peter A. Koch, Christoph Ballauff, Matthias Lu, Yan Benson, Oliver Silver nanowires with optimized silica coating as versatile plasmonic resonators |
title | Silver nanowires with optimized silica coating as versatile plasmonic resonators |
title_full | Silver nanowires with optimized silica coating as versatile plasmonic resonators |
title_fullStr | Silver nanowires with optimized silica coating as versatile plasmonic resonators |
title_full_unstemmed | Silver nanowires with optimized silica coating as versatile plasmonic resonators |
title_short | Silver nanowires with optimized silica coating as versatile plasmonic resonators |
title_sort | silver nanowires with optimized silica coating as versatile plasmonic resonators |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6405757/ https://www.ncbi.nlm.nih.gov/pubmed/30846736 http://dx.doi.org/10.1038/s41598-019-40380-5 |
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