Issue 35, 2023

Magnetic carbon gate electrodes for the development of electrolyte-gated organic field effect transistor bio-sensing platforms

Abstract

Electrolyte-gated organic field-effect transistors (EGOFETs) are promising devices for the development of bio-sensors. Typically, a gold gate electrode is functionalised with a self-assembled monolayer bearing the bio-receptor. Here, we propose a new route to fabricate EGOFET sensors using magnetic carbon-paste gate electrodes. In this way, magnetic nanoparticles properly modified with a bio-receptor are incubated with the analyte and, subsequently, collected on the gate electrode surface. Remarkably, these electrodes can be polished and re-used after each measurement. The feasibility of this route is here demonstrated for the biotin–avidin/streptavidin supramolecular complexes. High sensitivities and low limits of detection of the order of fM are achieved. Hence, this work demonstrates a novel and versatile strategy to exploit EGOFETs as sensing platforms.

Graphical abstract: Magnetic carbon gate electrodes for the development of electrolyte-gated organic field effect transistor bio-sensing platforms

Supplementary files

Article information

Article type
Paper
Submitted
11 Maijs 2023
Accepted
07 Aug. 2023
First published
12 Aug. 2023
This article is Open Access
Creative Commons BY license

J. Mater. Chem. C, 2023,11, 11912-11919

Magnetic carbon gate electrodes for the development of electrolyte-gated organic field effect transistor bio-sensing platforms

A. Tamayo, J. Muñoz, C. Martínez-Domingo and M. Mas-Torrent, J. Mater. Chem. C, 2023, 11, 11912 DOI: 10.1039/D3TC01655B

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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