期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 358, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2022.131518
关键词
C-reactive protein; Sandwich-typed immunosensor; Porous carbon nanospheres; Nanobead chains
资金
- Zhejiang Public Welfare Technology Application Research Project [LGG19B050001]
In this study, a novel immunosensor was developed for the sensitive detection of CRP using Au-N-CNSs and AuPtRh NBCs. The sandwich-typed immunosensor exhibited a broad linear range and a low detection limit, providing valuable insights for early diagnosis of inflammation and tissue damage.
C-reactive protein (CRP) is commonly utilized as a significant biomarker for inflammation and infection, whose sensitive detection is of importance for early diagnosis of such diseases as a greatly reliable prediction. In this work, a novel sandwich-typed electrochemical immunosensor was built based on mono-dispersed nitrogen-rich porous carbon nanospheres decorated with Au nanoparticles (Au-N-CNSs) for such determination, coupled with multiply twinned AuPtRh nanobead chains (AuPtRh NBCs) as a label material. The AuPtRh NBCs were synthesized by a simple solvothermal method with micelles of a block copolymer poly(ethylene oxide)-b-poly (methyl methacrylate) (PEO(10500)-b-PMMA((18000))), which can enlarge the loading capacity, significantly catalyze the oxidation of potassium ferricyanide (K-3[Fe(CN)(6)]), and increase the conductivity, ultimately amplifying the signals. The obtained sandwich-typed immunosensor showed a broad linear range of 0.01 ng mL(-1)-100 mu g mL(-1), and a low limit of detection (LOD = 7.70 pg mL(-1)). This strategy offers certain constructive insights for both bioanalysis and early clinical diagnosis of inflammation or tissue damage.
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