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- W2912763162 abstract "Electrochemical immunosensors are generally layer-by-layer or sandwich systems designed to detect an analyte in a solution. Immunosensors are mainly based on the high affinity and specificity of the antibody towards its antigen. This work aims to answer the following question: if we ‘flip’ the immunosensor and build it backwards, thus detecting the antibody with the antigen instead of detecting the antigen with the antibody, will we obtain the same immunosensors properties or not? To answer this question, they tested a system composed of glycated human serum albumin and antibody-functionalised gold nanoparticles. Impedance spectrum results showed a difference in both the sensitivity and linear range of the built impedimetric immunosensors. The sensitivity of the sensor using the antibody as a bioreceptor was approximated to 0.32 [%. [% (Glycated to total albumin])] − 1] against a sensitivity of 0.80 [%. [% (Glycated to total albumin])] − 1] for the ‘upside-down’ sensor, using the antigen as a bioreceptor. This study observed also a shift to high glycation levels in the linear range of the upside-down sensor. These differences could be explained by the effect of steric hindrance and a higher degree of freedom allowing better characteristics for the upside-down immunosensor." @default.
- W2912763162 created "2019-02-21" @default.
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- W2912763162 date "2019-05-01" @default.
- W2912763162 modified "2023-10-18" @default.
- W2912763162 title "Antibody‐functionalised gold nanoparticles‐based impedimetric immunosensor: detection methods for better sensitivity" @default.
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- W2912763162 doi "https://doi.org/10.1049/mnl.2018.5587" @default.
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