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Evaluation of Aptamer and Molecularly Imprinted Polymers as a First Hybrid Sensor for Leptin Detection at Femtogram Levels by Cem Erkmen; Gözde Aydoğdu Tig; Bengi Uslu is a Chemistry article available to read on EtoBox.

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Selective and sensitive determination of macromolecules maintains its importance in diagnosing and determining diseases to protect human health. In this study, a hybrid sensor designed with dual recognition elements consisting of both aptamers (Apt) and molecularly imprinted polymers (MIPs) was carried out for the ultra-sensitive determination of Leptin. Firstly, the screen-printed electrode (SPE) surface was coated with platinum nanospheres (Pt NSs) and gold nanoparticles (Au NPs) to provide immobilization of the Apt[Leptin] complex on the surface. In the next step, the formed polymer layer around the complex using the electropolymerization of orthophenilendiamine (oPD) kept the Apt molecules on the surface more effectively. As expected, a synergistic effect occurred between the formed MIP cavities by removing Leptin from the surface and the embedded Apt molecules to fabricate a hybrid sensor. Under optimal conditions, responses in differential pulse voltammetry (DPV) currents showed a linear response over a wide concentration range from 1.0 fg/mL to 10.0 pg/mL with a limit of detection (LOD) of 0.31 fg/mL for Leptin detection. Moreover, the effectiveness of the hybrid sensor was

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Author

Cem Erkmen; Gözde Aydoğdu Tig; Bengi Uslu

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Chemistry (Physical Sciences)