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Excellent fluorescence detection of Cu2+in water system using N-acetyl-L-cysteines modified CdS quantum dots as fluorescence probe.
Zhao, Rongjun; Wang, Zhezhe; Tian, Xu; Shu, Hui; Yang, Yue; Xiao, Xuechun; Wang, Yude.
Afiliação
  • Zhao R; School of Materials and Energy, Yunnan University, 650091 Kunming, People's Republic of China.
  • Wang Z; School of Materials and Energy, Yunnan University, 650091 Kunming, People's Republic of China.
  • Tian X; School of Materials and Energy, Yunnan University, 650091 Kunming, People's Republic of China.
  • Shu H; School of Materials and Energy, Yunnan University, 650091 Kunming, People's Republic of China.
  • Yang Y; Department of Physics, Yunnan University, 650091 Kunming, People's Republic of China.
  • Xiao X; School of Materials and Energy, Yunnan University, 650091 Kunming, People's Republic of China.
  • Wang Y; Key Lab of Quantum Information of Yunnan Province, Yunnan University, 650091 Kunming, People's Republic of China.
Nanotechnology ; 32(40)2021 Jul 15.
Article em En | MEDLINE | ID: mdl-34192671
View of the negative influence of metal ions on natural environment and human health, fast and quantitative detection of metals ions in water systems is significant. Ultra-small grain size CdS quantum dots (QDs) modified with N-acetyl-L-cysteines (NALC) (NALC-CdS QDs) are successfully prepared via a facile hydrothermal route. Based on the changes of fluorescence intensity of NALC-CdS QDs solution after adding metal ions, the fluorescence probe made from the NALC-CdS QDs is developed to detect metal ions in water systems. Among various metal ions, the fluorescence of NALC-CdS QDs effectively quenched by the addition of Cu2+, the probe shows high sensitivity and selectivity for detecting Cu2+in other interferential metal ions coexisted system. Importantly, the fluorescence intensity of NALC-CdS QDs changes upon the concentration of Cu2+, the probe displays an excellent linear relationship between the fluorescence quenching rate and the concentration of Cu2+in ranging from 1 to 25µM. Besides, the detected limitation of the probe towards Cu2+as low as 0.48µM. The measurement of Cu2+in real water sample is also carried out using the probe. The results indicate that NALC-CdS QDs fluorescence probe may be a promising candidate for quantitative Cu2+detection in practical application.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Diagnostic_studies Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Tipo de estudo: Diagnostic_studies Idioma: En Ano de publicação: 2021 Tipo de documento: Article