Water-Soluble N-Acetyl-L-cysteine-Capped CdTe Quantum Dots Application for Hg(II) Detection

A simple, rapid, and specific method for Hg(II) detection has been proposed based on the fluorescence change of N-acetyl-L-cysteine-capped CdTe quantum dots (QDs). The presence of Hg(II) ions could quench the fluorescence of QDs at 565 nm and meanwhile produce new peak in 700–860 nm wavelength range...

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Detalles Bibliográficos
Autores principales: Yang, Tianming, He, Qingyi, Liu, Yuying, Zhu, Chaozhen, Zhao, Dan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2013
Materias:
Research Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3723248/
https://www.ncbi.nlm.nih.gov/pubmed/23936732
http://dx.doi.org/10.1155/2013/902951
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author Yang, Tianming
He, Qingyi
Liu, Yuying
Zhu, Chaozhen
Zhao, Dan
author_facet Yang, Tianming
He, Qingyi
Liu, Yuying
Zhu, Chaozhen
Zhao, Dan
author_sort Yang, Tianming
collection PubMed
description A simple, rapid, and specific method for Hg(II) detection has been proposed based on the fluorescence change of N-acetyl-L-cysteine-capped CdTe quantum dots (QDs). The presence of Hg(II) ions could quench the fluorescence of QDs at 565 nm and meanwhile produce new peak in 700–860 nm wavelength range. The linear response range is 20–430 nM with the detection limit at 8.0 nM Hg(II). It was found that the position of the new peak was irrelevant to the size of QDs. Furthermore, the mechanism of the quenching of QDs fluorescence by Hg(II) and the appearance of new peak in near-infrared area were also discussed and deduced through ultraviolet absorption spectrum, fluorescence spectrum, and X-ray photoelectron spectrum.
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spelling pubmed-37232482013-08-09 Water-Soluble N-Acetyl-L-cysteine-Capped CdTe Quantum Dots Application for Hg(II) Detection Yang, Tianming He, Qingyi Liu, Yuying Zhu, Chaozhen Zhao, Dan J Anal Methods Chem Research Article A simple, rapid, and specific method for Hg(II) detection has been proposed based on the fluorescence change of N-acetyl-L-cysteine-capped CdTe quantum dots (QDs). The presence of Hg(II) ions could quench the fluorescence of QDs at 565 nm and meanwhile produce new peak in 700–860 nm wavelength range. The linear response range is 20–430 nM with the detection limit at 8.0 nM Hg(II). It was found that the position of the new peak was irrelevant to the size of QDs. Furthermore, the mechanism of the quenching of QDs fluorescence by Hg(II) and the appearance of new peak in near-infrared area were also discussed and deduced through ultraviolet absorption spectrum, fluorescence spectrum, and X-ray photoelectron spectrum. Hindawi Publishing Corporation 2013 2013-07-09 /pmc/articles/PMC3723248/ /pubmed/23936732 http://dx.doi.org/10.1155/2013/902951 Text en Copyright © 2013 Tianming Yang et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Yang, Tianming
He, Qingyi
Liu, Yuying
Zhu, Chaozhen
Zhao, Dan
Water-Soluble N-Acetyl-L-cysteine-Capped CdTe Quantum Dots Application for Hg(II) Detection
title Water-Soluble N-Acetyl-L-cysteine-Capped CdTe Quantum Dots Application for Hg(II) Detection
title_full Water-Soluble N-Acetyl-L-cysteine-Capped CdTe Quantum Dots Application for Hg(II) Detection
title_fullStr Water-Soluble N-Acetyl-L-cysteine-Capped CdTe Quantum Dots Application for Hg(II) Detection
title_full_unstemmed Water-Soluble N-Acetyl-L-cysteine-Capped CdTe Quantum Dots Application for Hg(II) Detection
title_short Water-Soluble N-Acetyl-L-cysteine-Capped CdTe Quantum Dots Application for Hg(II) Detection
title_sort water-soluble n-acetyl-l-cysteine-capped cdte quantum dots application for hg(ii) detection
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3723248/
https://www.ncbi.nlm.nih.gov/pubmed/23936732
http://dx.doi.org/10.1155/2013/902951
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