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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...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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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. |
format | Online Article Text |
id | pubmed-6165047 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
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 |
work_keys_str_mv | AT shehatanader plasmonicceriananoparticlesasfluorescenceintensityandlifetimequenchingopticalsensor AT samireffat plasmonicceriananoparticlesasfluorescenceintensityandlifetimequenchingopticalsensor AT kandasishac plasmonicceriananoparticlesasfluorescenceintensityandlifetimequenchingopticalsensor |