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Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity

In this paper we evaluate the effect of roughness and thickness of silver film substrates, fabricated on glass and polydimethylsiloxane (PDMS) templates, on surface-enhanced Raman Spectroscopy (SERS) activity. While the silver substrates obtained on glass templates exhibit nm-scale roughness, the si...

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Autores principales: Lee, Changwon, Robertson, Christopher S., Nguyen, An H., Kahraman, Mehmet, Wachsmann-Hogiu, Sebastian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5155581/
https://www.ncbi.nlm.nih.gov/pubmed/26119106
http://dx.doi.org/10.1038/srep11644
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author Lee, Changwon
Robertson, Christopher S.
Nguyen, An H.
Kahraman, Mehmet
Wachsmann-Hogiu, Sebastian
author_facet Lee, Changwon
Robertson, Christopher S.
Nguyen, An H.
Kahraman, Mehmet
Wachsmann-Hogiu, Sebastian
author_sort Lee, Changwon
collection PubMed
description In this paper we evaluate the effect of roughness and thickness of silver film substrates, fabricated on glass and polydimethylsiloxane (PDMS) templates, on surface-enhanced Raman Spectroscopy (SERS) activity. While the silver substrates obtained on glass templates exhibit nm-scale roughness, the silver substrates on PDMS templates show larger roughness, on the order of 10 s of nm. These roughness values do not change significantly with the thickness of the silver film. The SERS intensities of 4-aminothiophenol (ATP) deposited on these substrates strongly depend on both roughness and thickness, with more significant contribution from the roughness on thinner films. FEM simulations of the electric field intensities on surfaces of different thicknesses for rough and flat surfaces suggest higher localized plamons on thinner, rough surfaces. This study indicates that, besides roughness, the thickness of the metallic layer plays a significant role in the SERS activity.
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spelling pubmed-51555812016-12-20 Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity Lee, Changwon Robertson, Christopher S. Nguyen, An H. Kahraman, Mehmet Wachsmann-Hogiu, Sebastian Sci Rep Article In this paper we evaluate the effect of roughness and thickness of silver film substrates, fabricated on glass and polydimethylsiloxane (PDMS) templates, on surface-enhanced Raman Spectroscopy (SERS) activity. While the silver substrates obtained on glass templates exhibit nm-scale roughness, the silver substrates on PDMS templates show larger roughness, on the order of 10 s of nm. These roughness values do not change significantly with the thickness of the silver film. The SERS intensities of 4-aminothiophenol (ATP) deposited on these substrates strongly depend on both roughness and thickness, with more significant contribution from the roughness on thinner films. FEM simulations of the electric field intensities on surfaces of different thicknesses for rough and flat surfaces suggest higher localized plamons on thinner, rough surfaces. This study indicates that, besides roughness, the thickness of the metallic layer plays a significant role in the SERS activity. Nature Publishing Group 2015-06-29 /pmc/articles/PMC5155581/ /pubmed/26119106 http://dx.doi.org/10.1038/srep11644 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Lee, Changwon
Robertson, Christopher S.
Nguyen, An H.
Kahraman, Mehmet
Wachsmann-Hogiu, Sebastian
Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity
title Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity
title_full Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity
title_fullStr Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity
title_full_unstemmed Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity
title_short Thickness of a metallic film, in addition to its roughness, plays a significant role in SERS activity
title_sort thickness of a metallic film, in addition to its roughness, plays a significant role in sers activity
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5155581/
https://www.ncbi.nlm.nih.gov/pubmed/26119106
http://dx.doi.org/10.1038/srep11644
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