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Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor

Ceria nanoparticles have been recently used as an optical fluorescent material with visible emission under ultraviolet excitation, due to the formation of trivalent cerium ions with corresponding oxygen vacancies. This paper introduces the enhancement of both fluorescence emission and lifetime throu...

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Detalles Bibliográficos
Autores principales: Shehata, Nader, Samir, Effat, Kandas, Ishac
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6165047/
https://www.ncbi.nlm.nih.gov/pubmed/30150514
http://dx.doi.org/10.3390/s18092818
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author Shehata, Nader
Samir, Effat
Kandas, Ishac
author_facet Shehata, Nader
Samir, Effat
Kandas, Ishac
author_sort Shehata, Nader
collection PubMed
description Ceria nanoparticles have been recently used as an optical fluorescent material with visible emission under ultraviolet excitation, due to the formation of trivalent cerium ions with corresponding oxygen vacancies. This paper introduces the enhancement of both fluorescence emission and lifetime through adding gold nanoparticles. The reason is due to possible coupling between the plasmonic resonance of gold nanoparticles and the fluorescence emission of ceria that has been achieved, along with enhanced formation of trivalent cerium ions. Both factors lead to higher fluorescence intensity peaks and shorter fluorescence lifetimes. As an application, gold-ceria nanoparticles have been used as an optical sensing material for lead particles in aqueous media based on fluorescence quenching. Stern-Volmer constant of in-situ gold-ceria nanoparticles is found to be 2.424 M(−1), with a relative intensity change of up to 40% at 0.2 g/L.
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spelling pubmed-61650472018-10-10 Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor Shehata, Nader Samir, Effat Kandas, Ishac Sensors (Basel) Article Ceria nanoparticles have been recently used as an optical fluorescent material with visible emission under ultraviolet excitation, due to the formation of trivalent cerium ions with corresponding oxygen vacancies. This paper introduces the enhancement of both fluorescence emission and lifetime through adding gold nanoparticles. The reason is due to possible coupling between the plasmonic resonance of gold nanoparticles and the fluorescence emission of ceria that has been achieved, along with enhanced formation of trivalent cerium ions. Both factors lead to higher fluorescence intensity peaks and shorter fluorescence lifetimes. As an application, gold-ceria nanoparticles have been used as an optical sensing material for lead particles in aqueous media based on fluorescence quenching. Stern-Volmer constant of in-situ gold-ceria nanoparticles is found to be 2.424 M(−1), with a relative intensity change of up to 40% at 0.2 g/L. MDPI 2018-08-27 /pmc/articles/PMC6165047/ /pubmed/30150514 http://dx.doi.org/10.3390/s18092818 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Shehata, Nader
Samir, Effat
Kandas, Ishac
Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor
title Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor
title_full Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor
title_fullStr Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor
title_full_unstemmed Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor
title_short Plasmonic-Ceria Nanoparticles as Fluorescence Intensity and Lifetime Quenching Optical Sensor
title_sort plasmonic-ceria nanoparticles as fluorescence intensity and lifetime quenching optical sensor
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6165047/
https://www.ncbi.nlm.nih.gov/pubmed/30150514
http://dx.doi.org/10.3390/s18092818
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