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MnO2-induced synthesis of fluorescent polydopamine nanoparticles for reduced glutathione sensing in human whole blood

Polydopamine (PDA) nanoparticles, as a kind of popular polymer material, have attracted a great deal of attention from various areas including materials science, biomedicine, energy, environmental science and so on owing to their striking physicochemical properties. Herein, we reported for the first...

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Published in:Nanoscale 2016-08, Vol.8 (34), p.15604-15610
Main Authors: Kong, Xiang-Juan, Wu, Shuang, Chen, Ting-Ting, Yu, Ru-Qin, Chu, Xia
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container_end_page 15610
container_issue 34
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container_title Nanoscale
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creator Kong, Xiang-Juan
Wu, Shuang
Chen, Ting-Ting
Yu, Ru-Qin
Chu, Xia
description Polydopamine (PDA) nanoparticles, as a kind of popular polymer material, have attracted a great deal of attention from various areas including materials science, biomedicine, energy, environmental science and so on owing to their striking physicochemical properties. Herein, we reported for the first time the synthesis of intrinsic fluorescent PDA nanoparticles using MnO2 as an oxidant. In the presence of MnO2, dopamine was quickly oxidized into its quinone derivative, and autopolymerized into fluorescent PDA nanoparticles. Using fluorescent PDA nanoparticles as a fluorescence signal indicator, we further established a cost-effective sensor for rapid, sensitive and selective sensing of reduced glutathione (GSH) based on the redox reaction between MnO2 and GSH, and the key role of MnO2 in the formation of fluorescent PDA nanoparticles. GSH has the capability of reducing MnO2 into Mn(2+), which inhibited the formation of the fluorescent PDA nanoparticles. Thus, the concentration of GSH was directly related to the decreased fluorescence signal intensity of the PDA nanoparticles. The sensor showed good sensing performance for GSH detection with high sensitivity and desirable selectivity over other potential interfering species. Additionally, the sensor exhibited excellent practical applications for GSH detection in human whole blood samples, which presents potential applications in biological detection and clinical diagnosis.
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source Royal Society of Chemistry
subjects Detection
Fluorescence
Formations
Glutathione
Glutathione - blood
Humans
Indoles - chemistry
Manganese Compounds - chemistry
Nanoparticles
Oxides - chemistry
PDA
Polymers - chemistry
Sensors
Synthesis
title MnO2-induced synthesis of fluorescent polydopamine nanoparticles for reduced glutathione sensing in human whole blood
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