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- W3049205413 endingPage "128772" @default.
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- W3049205413 abstract "Traditional electrochemical immunosensors have stagnated due to the lack of signal tags and single signal amplification strategies. In this work, we propose a new signal amplification strategy, a photoassisted heterogeneous Fenton self-oxidation reaction, for the detection of prostate-specific antigen (PSA). A prepared ferric tetroxide (Fe3O4)@Carbon(C)@Glucose oxidase (GOD) heterogeneous Fenton electrochemical sensor is first immersed in a solution containing glucose, persulfate (S2O82−) and tannic acid (TA), and then it is irradiated with ultraviolet light at 365 nm. Utilizing a coupling reaction, S2O82- promotes the use of ultraviolet light by Fe3O4@C−[email protected] to generate more OH radicals; furthermore, the coordination of tannic acid to Fe2+ promotes the oxidation of Fe2+ in Fe3O4 to Fe3+ by OH. This achieves a signal amplification of 3 times the value of the original system. More importantly, the Fenton reagent undergoes a self-oxidation reaction without the need to add a signal tag. The proposed immunosensor uses a new signal amplification strategy that can be used for detecting tumor markers. Additionally, due to the self-oxidation of the Fenton reagent and the C coating, the problem of signal tag leakage is effectively solved. The electrochemical immunosensor detects different concentrations of PSA and exhibits excellent analytical performance, with a detection limit of 0.17 pg/mL and a detection range of 0.5 pg/mL to 40 ng/mL. The prepared immunosensor provides a feasible method for the detection of cancer tumor markers." @default.
- W3049205413 created "2020-08-21" @default.
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- W3049205413 date "2020-12-01" @default.
- W3049205413 modified "2023-10-03" @default.
- W3049205413 title "Electrochemical sensor for a photoassisted heterogeneous Fenton self-oxidation signal amplification strategy" @default.
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- W3049205413 doi "https://doi.org/10.1016/j.snb.2020.128772" @default.
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