کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5031349 1470933 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ni(OH)2/NGQDs-based electrochemiluminescence immunosensor for prostate specific antigen detection by coupling resonance energy transfer with Fe3O4@MnO2 composites
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Ni(OH)2/NGQDs-based electrochemiluminescence immunosensor for prostate specific antigen detection by coupling resonance energy transfer with Fe3O4@MnO2 composites
چکیده انگلیسی


- The Fe3O4@MnO2 composites with wider ultraviolet absorption range were successfully assembled.
- The successful ECL-RET between NGQDs and Fe3O4@MnO2 composite were established.
- Sensitive detection of PSA was achieved with good selectivity, stability and accuracy.

An efficient quenching electrochemiluminescence (ECL) immunosensor based on ECL resonance energy transfer (ECL-RET) was studied for sensitive analysis of prostate specific antigen (PSA). In this protocol, nitrogen-doped graphene quantum dots (NGQDs) which could produce excellent ECL emission, were loaded onto Ni(OH)2 with the three-dimensional (3D) hierarchical and stacked lamellar structure. Taking advantages of high conductivity and large specific surface area of Ni(OH)2, the better electrochemical and ECL behavior of Ni(OH)2/NGQDs were presented. As another part of immunosensor, the Fe3O4@MnO2 composites with wider ultraviolet absorption range were successfully assembled. The absorption spectra of Fe3O4@MnO2 precisely overlapped with the ECL spectra of NGQDs, leading to the significant decrement of ECL signal. Herein, the sandwich-type immunosensor was developed based on the quenching mechanism between NGQDs (ECL donor) and Fe3O4@MnO2 (ECL acceptor). The system was optimized to realize reliable determination of PSA concentration within the linear range of 10−5-10 ng/mL and a detection limit of 5 fg/mL (S/N = 3). Eminently, the developed method was successfully applied in real serum samples with good recoveries in a range from 94.0% to 102%, indicating the good accuracy of the proposed method for PSA detection.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biosensors and Bioelectronics - Volume 99, 15 January 2018, Pages 346-352
نویسندگان
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