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|Title:||NFC-enabling smartphone-based portable amperometric immunosensor for hepatitis B virus detection|
Electrochemical impedance spectroscopy
Hepatitis B surface antigen
Linear calibration curve
Screen-printed graphene electrodes
The near field communication (NFC)
Near field communication
|Abstract:||A smartphone-controlled electrochemical sensor operated entirely via Near Field Communication (NFC) was used to create a simple label-free immunoassay for detecting Hepatitis B Virus (HBV). The completed system was composed of a card-sized electrochemical NFC tag sensor integrated with a smartphone and antibody-modified electrode sensor. Screen-printed graphene electrodes (SPGE) were modified with gold nanoparticles, increasing high sensitivity while β-cyclodextrin (β-CD) was electropolymerized on the surface to capture antibodies. The modification and immobilization processes were verified by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The NFC-based electrochemical immunosensor was then used to quantify Hepatitis B surface antigen (HBsAg) using amperometric detection by measuring the current from the (Fe(CN)6)3−/4− redox couple before and after addition of HBsAg. The linear calibration curve and limit of detection for HBsAg were found to be 10−200 μg/mL and 0.17 μg/mL, respectively. The sensor was then tested with chronic HBV infected serum samples and the system showed a good correlation with traditional immunoassays. This electrochemical immunosensor has the potential to be an alternative platform for portable, simple, sensitive and selective tools that can readily assess a variety of health indicators using a low-cost sensor system operated from a smartphone. © 2020 Elsevier B.V.|
|Appears in Collections:||SCOPUS 1983-2021|
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