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• W2034298711 endingPage "147" @default.
• W2034298711 startingPage "143" @default.
• W2034298711 abstract "Highly sensitive biosensors are of high importance to the biomedical field. Graphene represents a promising transducing platform for construction of biosensors. Here for the first time we compare the biosensing performance of a wide set of graphenes prepared by different methods. In this work, we present a simple and label-free electrochemical impedimetric aptasensor for thrombin based on chemically modified graphene (CMG) platforms such as graphite oxide (GPO), graphene oxide (GO), thermally reduced graphene oxide (TR-GO) and electrochemically reduced graphene oxide (ER-GO). Disposable screen-printed electrodes were first modified with chemically modified graphene (CMG) materials and used to immobilize a DNA aptamer which is specific to thrombin. The basis of detection relies on the changes in impedance spectra of redox probe after the binding of thrombin to the aptamer. It was discovered that graphene oxide (GO) is the most suitable material to be used as compared to the other three CMG materials. Furthermore, the optimum concentration of aptamer to be immobilized onto the modified electrode surface was determined to be 10 μM and the linear detection range of thrombin was 10-50 nM. Lastly, the aptasensor was found to demonstrate selectivity for thrombin. Such simply fabricated graphene oxide aptasensor shows high promise for clinical diagnosis of biomarkers and point-of-care analysis." @default.
• W2034298711 created "2016-06-24" @default.
• W2034298711 creator A5027346868 @default.
• W2034298711 creator A5061372715 @default.
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• W2034298711 date "2012-01-01" @default.
• W2034298711 modified "2023-09-23" @default.
• W2034298711 title "Impedimetric thrombin aptasensor based on chemically modified graphenes" @default.
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• W2034298711 doi "https://doi.org/10.1039/c1nr10966a" @default.
• W2034298711 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22068751" @default.
• W2034298711 hasPublicationYear "2012" @default.
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