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Released Plasmonic Electric Field of Ultrathin Tetrahedral-Amorphous-Carbon Films Coated Ag Nanoparticles for SERS

We have demonstrated the plasmonic characteristics of an ultrathin tetrahedral amorphous carbon (ta-C) film coated with Ag nanoparticles. The simulation result shows that, under resonant and non-resonant excitations, the strongest plasmonic electric field of 1 nm ta-C coated Ag nanoparticle is not t...

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Detalles Bibliográficos
Autores principales: Liu, Fanxin, Tang, Chaojun, Zhan, Peng, Chen, Zhuo, Ma, Hongtao, Wang, Zhenlin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3968450/
https://www.ncbi.nlm.nih.gov/pubmed/24675437
http://dx.doi.org/10.1038/srep04494
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author Liu, Fanxin
Tang, Chaojun
Zhan, Peng
Chen, Zhuo
Ma, Hongtao
Wang, Zhenlin
author_facet Liu, Fanxin
Tang, Chaojun
Zhan, Peng
Chen, Zhuo
Ma, Hongtao
Wang, Zhenlin
author_sort Liu, Fanxin
collection PubMed
description We have demonstrated the plasmonic characteristics of an ultrathin tetrahedral amorphous carbon (ta-C) film coated with Ag nanoparticles. The simulation result shows that, under resonant and non-resonant excitations, the strongest plasmonic electric field of 1 nm ta-C coated Ag nanoparticle is not trapped within the ta-C layer but is released to its outside surface, while leaving the weaker electric field inside ta-C layer. Moreover, this outside plasmonic field shows higher intensity than that of uncoated Ag nanoparticle, which is closely dependent on the excitation wavelength and size of Ag particles. These observations are supported by the SERS measurements. We expect that the ability for ultrathin ta-C coated Ag nanoparticles as the SERS substrates to detect low concentrations of target biomolecules opens the door to the applications where it can be used as a detection tool for integrated, on-chip devices.
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spelling pubmed-39684502014-03-28 Released Plasmonic Electric Field of Ultrathin Tetrahedral-Amorphous-Carbon Films Coated Ag Nanoparticles for SERS Liu, Fanxin Tang, Chaojun Zhan, Peng Chen, Zhuo Ma, Hongtao Wang, Zhenlin Sci Rep Article We have demonstrated the plasmonic characteristics of an ultrathin tetrahedral amorphous carbon (ta-C) film coated with Ag nanoparticles. The simulation result shows that, under resonant and non-resonant excitations, the strongest plasmonic electric field of 1 nm ta-C coated Ag nanoparticle is not trapped within the ta-C layer but is released to its outside surface, while leaving the weaker electric field inside ta-C layer. Moreover, this outside plasmonic field shows higher intensity than that of uncoated Ag nanoparticle, which is closely dependent on the excitation wavelength and size of Ag particles. These observations are supported by the SERS measurements. We expect that the ability for ultrathin ta-C coated Ag nanoparticles as the SERS substrates to detect low concentrations of target biomolecules opens the door to the applications where it can be used as a detection tool for integrated, on-chip devices. Nature Publishing Group 2014-03-28 /pmc/articles/PMC3968450/ /pubmed/24675437 http://dx.doi.org/10.1038/srep04494 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-nd/3.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-nd/3.0/
spellingShingle Article
Liu, Fanxin
Tang, Chaojun
Zhan, Peng
Chen, Zhuo
Ma, Hongtao
Wang, Zhenlin
Released Plasmonic Electric Field of Ultrathin Tetrahedral-Amorphous-Carbon Films Coated Ag Nanoparticles for SERS
title Released Plasmonic Electric Field of Ultrathin Tetrahedral-Amorphous-Carbon Films Coated Ag Nanoparticles for SERS
title_full Released Plasmonic Electric Field of Ultrathin Tetrahedral-Amorphous-Carbon Films Coated Ag Nanoparticles for SERS
title_fullStr Released Plasmonic Electric Field of Ultrathin Tetrahedral-Amorphous-Carbon Films Coated Ag Nanoparticles for SERS
title_full_unstemmed Released Plasmonic Electric Field of Ultrathin Tetrahedral-Amorphous-Carbon Films Coated Ag Nanoparticles for SERS
title_short Released Plasmonic Electric Field of Ultrathin Tetrahedral-Amorphous-Carbon Films Coated Ag Nanoparticles for SERS
title_sort released plasmonic electric field of ultrathin tetrahedral-amorphous-carbon films coated ag nanoparticles for sers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3968450/
https://www.ncbi.nlm.nih.gov/pubmed/24675437
http://dx.doi.org/10.1038/srep04494
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