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HomeJournal of Nano ResearchJournal of Nano Research Vol. 46A Novel Near-Infrared Fluorescence Sensor for H2O2...

A Novel Near-Infrared Fluorescence Sensor for H₂O₂ Based on N-Acetyl-L-Cysteine-Capped Gold Nanoparticles

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Abstract:

A novel near-infrared fluorescence quenching method has been developed for the determination of hydrogen peroxide based on N-acetyl-L-cysteine-capped gold nanoparticles (NAC-AuNPs) as a fluorescence probe. The prepared gold nanoparticles with the size of about 1.91 nm exhibited strong near-infrared fluorescence emission at 693 nm with excitation wavelength at 450 nm in aqueous solution. The fluorescence intensity of NAC-AuNPs was quenched dramatically by adding hydrogen peroxide. Therefore, it could be used to detect hydrogen peroxide based on the fluorescence quenching intensity was linear with the concentration of hydrogen peroxide. Under the optimal experimental conditions, the linear range and detection limit were 1.0×10^-6 –3.0×10^-2 mol/L and 1.0×10^-7 mol/L, respectively. The possible quenching mechanism was investigated by time-resolved fluorescence spectroscopy. The proposed method was simple, sensitive and showed good repeatability and stability.

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Journal of Nano Research Vol. 46

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Periodical:

Journal of Nano Research (Volume 46)

Pages:

234-240

DOI:

https://doi.org/10.4028/www.scientific.net/JNanoR.46.234

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Online since:

March 2017

Authors:

Wen Juan Dong*, Ji Yan Han, Xin Wu, Li Fan, Wen Ting Liang

Keywords:

Gold Nanoparticle, H₂O₂, Near-Infrared Fluorescence

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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