2021
DOI: 10.1021/acs.analchem.0c05102
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Self-Catalyzed Surface Reaction-Induced Fluorescence Resonance Energy Transfer on Cysteine-Stabilized MnO2 Quantum Dots for Selective Detection of Dopamine

Abstract: A simple one-step ultrasonic method was developed for the synthesis of luminescent MnO2 quantum dots (MnO2 QDs) in the presence of cysteine, in which cysteine acted as the exfoliating agent and stabilization ligand. The cysteine-stabilized MnO2 QDs (Cys-MnO2 QDs) possess a fluorescence quantum yield of 4.7%, and the fluorescence intensity of Cys-MnO2 QDs is sensitive to dopamine (DA). The mechanism by which the Cys-MnO2 QDs catalyzed the self-polymerization of DA to form polydopamine nanoparticles (PDA NPs) an… Show more

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Cited by 90 publications
(69 citation statements)
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“…This is because they tend to coexist in biological systems on the one hand, and on the other hand, their abnormal levels would lead to various diseases. [1][2][3][4][5] Therefore, it is highly desirable to explore sensitive and selective analytical techniques for the simultaneous quantification of DA, AA and UA to gain insight into healthcare and clinical diagnostics. Since they are electrochemically active, an electrochemical method has been generally developed as an affordable and reliable tool to simultaneously detect a variety of biochemicals owing to its remarkable advantages of fast response, high sensitivity, and no requirement for any expensive equipment and complicated procedure.…”
Section: Introductionmentioning
confidence: 99%
“…This is because they tend to coexist in biological systems on the one hand, and on the other hand, their abnormal levels would lead to various diseases. [1][2][3][4][5] Therefore, it is highly desirable to explore sensitive and selective analytical techniques for the simultaneous quantification of DA, AA and UA to gain insight into healthcare and clinical diagnostics. Since they are electrochemically active, an electrochemical method has been generally developed as an affordable and reliable tool to simultaneously detect a variety of biochemicals owing to its remarkable advantages of fast response, high sensitivity, and no requirement for any expensive equipment and complicated procedure.…”
Section: Introductionmentioning
confidence: 99%
“…In contrast, the suspension of Nile Red-MAPC showed weak fluorescence, possibly due to the selfquenching in the lipid core and the energy transfer from the dye molecules to PDA. 38,39 The suspension of Nile Red-MAPC was placed in a dialysis bag, immersed in water, subjected to NIR irradiation, and incubated for 24 h. After that, the fluorescence spectrum of water was recorded to monitor the released Nile Red. Samples without NIR irradiation were conducted as a control.…”
Section: Resultsmentioning
confidence: 99%
“…The absorption spectrum of CQDs/ MOX overlaps with the fluorescence emission spectrum of CQDs, and fluorescence resonance energy transfer (FRET) occurs between CQDs and CQDs/MOX. 25 An analytical method for MOX based on detection of CQDs fluorescence has been demonstrated. [26][27][28][29] This method has good selectivity, high stability, and low cost.…”
Section: Introductionmentioning
confidence: 99%