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Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy

We report on an optimized fabrication protocol for obtaining silver nanoparticles on fused silica substrates via laser photoreduction of a silver salt solution. We find that multiple scans of the laser over the surface leads to a more uniform coverage of densely packed silver nanoparticles of approx...

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Autores principales: MacKenzie, Mark, Chi, Haonan, Varma, Manoj, Pal, Parama, Kar, Ajoy, Paterson, Lynn
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6864074/
https://www.ncbi.nlm.nih.gov/pubmed/31745117
http://dx.doi.org/10.1038/s41598-019-53328-6
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author MacKenzie, Mark
Chi, Haonan
Varma, Manoj
Pal, Parama
Kar, Ajoy
Paterson, Lynn
author_facet MacKenzie, Mark
Chi, Haonan
Varma, Manoj
Pal, Parama
Kar, Ajoy
Paterson, Lynn
author_sort MacKenzie, Mark
collection PubMed
description We report on an optimized fabrication protocol for obtaining silver nanoparticles on fused silica substrates via laser photoreduction of a silver salt solution. We find that multiple scans of the laser over the surface leads to a more uniform coverage of densely packed silver nanoparticles of approximately 50 nm diameter on the fused silica surface. Our substrates yield Raman enhancement factors of the order of 10(11) of the signal detected from crystal violet. We use a theoretical model based on scanning electron microscope (SEM) images of our substrates to explain our experimental results. We also demonstrate how our technique can be extended to embedding silver nanoparticles in buried microfluidic channels in glass. The in situ laser inscription of silver nanoparticles on a laser machined, sub-surface, microfluidic channel wall within bulk glass paves the way for developing 3D, monolithic, fused silica surface enhance Raman spectroscopy (SERS) microfluidic sensing devices.
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spelling pubmed-68640742019-12-03 Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy MacKenzie, Mark Chi, Haonan Varma, Manoj Pal, Parama Kar, Ajoy Paterson, Lynn Sci Rep Article We report on an optimized fabrication protocol for obtaining silver nanoparticles on fused silica substrates via laser photoreduction of a silver salt solution. We find that multiple scans of the laser over the surface leads to a more uniform coverage of densely packed silver nanoparticles of approximately 50 nm diameter on the fused silica surface. Our substrates yield Raman enhancement factors of the order of 10(11) of the signal detected from crystal violet. We use a theoretical model based on scanning electron microscope (SEM) images of our substrates to explain our experimental results. We also demonstrate how our technique can be extended to embedding silver nanoparticles in buried microfluidic channels in glass. The in situ laser inscription of silver nanoparticles on a laser machined, sub-surface, microfluidic channel wall within bulk glass paves the way for developing 3D, monolithic, fused silica surface enhance Raman spectroscopy (SERS) microfluidic sensing devices. Nature Publishing Group UK 2019-11-19 /pmc/articles/PMC6864074/ /pubmed/31745117 http://dx.doi.org/10.1038/s41598-019-53328-6 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
MacKenzie, Mark
Chi, Haonan
Varma, Manoj
Pal, Parama
Kar, Ajoy
Paterson, Lynn
Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy
title Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy
title_full Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy
title_fullStr Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy
title_full_unstemmed Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy
title_short Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy
title_sort femtosecond laser fabrication of silver nanostructures on glass for surface enhanced raman spectroscopy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6864074/
https://www.ncbi.nlm.nih.gov/pubmed/31745117
http://dx.doi.org/10.1038/s41598-019-53328-6
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