Guided-Mode Resonance Grating with Self-Assembled Silver Nanoparticles for Surface-Enhanced Raman Scattering Spectroscopy

We designed and fabricated guided-mode resonance (GMR) gratings on indium-tin-oxide (ITO) thin film to generate a significantly enhanced local electric field for surface-enhanced Raman scattering (SERS) spectroscopy. Ag nanoparticles (NPs) were self-assembled onto the surface of the grating, which c...

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Autores principales: Yang, Jing, Ren, Fanghui, Chong, Xinyuan, Fan, Donglei, Chakravarty, Swapnajit, Wang, Zheng, Chen, Ray T., Wang, Alan X.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4779645/
https://www.ncbi.nlm.nih.gov/pubmed/26958546
http://dx.doi.org/10.3390/photonics1040380
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author Yang, Jing
Ren, Fanghui
Chong, Xinyuan
Fan, Donglei
Chakravarty, Swapnajit
Wang, Zheng
Chen, Ray T.
Wang, Alan X.
author_facet Yang, Jing
Ren, Fanghui
Chong, Xinyuan
Fan, Donglei
Chakravarty, Swapnajit
Wang, Zheng
Chen, Ray T.
Wang, Alan X.
author_sort Yang, Jing
collection PubMed
description We designed and fabricated guided-mode resonance (GMR) gratings on indium-tin-oxide (ITO) thin film to generate a significantly enhanced local electric field for surface-enhanced Raman scattering (SERS) spectroscopy. Ag nanoparticles (NPs) were self-assembled onto the surface of the grating, which can provide a large amount of “hot-spots” for SERS sensing. The ITO gratings also exhibit excellent tolerance to fabrication deviations due to the large refractive index contrast of the ITO grating. Quantitative experimental results of 5,5’-dithiobis(2-nitrobenzoic acid) (DTNB) demonstrate the best enhancement factor of ~14× on ITO gratings when compared with Ag NPs on a flat ITO film, and the limit of detection (LOD) of DTNB is as low as 10 pM.
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spelling pubmed-47796452016-03-06 Guided-Mode Resonance Grating with Self-Assembled Silver Nanoparticles for Surface-Enhanced Raman Scattering Spectroscopy Yang, Jing Ren, Fanghui Chong, Xinyuan Fan, Donglei Chakravarty, Swapnajit Wang, Zheng Chen, Ray T. Wang, Alan X. Photonics Article We designed and fabricated guided-mode resonance (GMR) gratings on indium-tin-oxide (ITO) thin film to generate a significantly enhanced local electric field for surface-enhanced Raman scattering (SERS) spectroscopy. Ag nanoparticles (NPs) were self-assembled onto the surface of the grating, which can provide a large amount of “hot-spots” for SERS sensing. The ITO gratings also exhibit excellent tolerance to fabrication deviations due to the large refractive index contrast of the ITO grating. Quantitative experimental results of 5,5’-dithiobis(2-nitrobenzoic acid) (DTNB) demonstrate the best enhancement factor of ~14× on ITO gratings when compared with Ag NPs on a flat ITO film, and the limit of detection (LOD) of DTNB is as low as 10 pM. 2014-10-23 2014-12 /pmc/articles/PMC4779645/ /pubmed/26958546 http://dx.doi.org/10.3390/photonics1040380 Text en licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yang, Jing
Ren, Fanghui
Chong, Xinyuan
Fan, Donglei
Chakravarty, Swapnajit
Wang, Zheng
Chen, Ray T.
Wang, Alan X.
Guided-Mode Resonance Grating with Self-Assembled Silver Nanoparticles for Surface-Enhanced Raman Scattering Spectroscopy
title Guided-Mode Resonance Grating with Self-Assembled Silver Nanoparticles for Surface-Enhanced Raman Scattering Spectroscopy
title_full Guided-Mode Resonance Grating with Self-Assembled Silver Nanoparticles for Surface-Enhanced Raman Scattering Spectroscopy
title_fullStr Guided-Mode Resonance Grating with Self-Assembled Silver Nanoparticles for Surface-Enhanced Raman Scattering Spectroscopy
title_full_unstemmed Guided-Mode Resonance Grating with Self-Assembled Silver Nanoparticles for Surface-Enhanced Raman Scattering Spectroscopy
title_short Guided-Mode Resonance Grating with Self-Assembled Silver Nanoparticles for Surface-Enhanced Raman Scattering Spectroscopy
title_sort guided-mode resonance grating with self-assembled silver nanoparticles for surface-enhanced raman scattering spectroscopy
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4779645/
https://www.ncbi.nlm.nih.gov/pubmed/26958546
http://dx.doi.org/10.3390/photonics1040380
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