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Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors
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Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors

Published on: January 31, 2025

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"Clickable" Organic Electrochemical Transistors.

Gonzalo E Fenoy1,2, Roger Hasler1, Felice Quartinello3

  • 1AIT Austrian Institute of Technology GmbH, Konrad-Lorenz Straße 24, 3430 Tulln an der Donau, Austria.

JACS Au
|January 2, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed the first "clickable" organic electrochemical transistors (OECTs) by functionalizing EDOT monomers with azide groups. These novel OECTs enable efficient bio-interfacing for advanced organic bioelectronic devices and biosensors.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Biotechnology

Background:

  • Developing efficient organic bioelectronic devices requires seamless interfacing between organic semiconductors and biological components.
  • Organic electrochemical transistors (OECTs) are promising for bioelectronic applications but often lack versatile surface modification strategies.

Purpose of the Study:

  • To introduce the first "clickable" organic electrochemical transistors (OECTs) using azide-functionalized monomers.
  • To demonstrate the utility of these OECTs for bio-conjugation and biosensing applications.

Main Methods:

  • Synthesis and characterization of an azide-derivatized EDOT monomer (azidomethyl-EDOT, EDOT-N3).
  • Electropolymerization of EDOT-N3 onto gold electrodes to form PEDOT-N3-OECTs.
  • Copper-catalyzed azide-alkyne cycloaddition (click chemistry) for conjugating biomolecules.

Main Results:

  • PEDOT-N3-OECTs exhibited improved characteristics, including lower threshold voltages and transconductance values near 0 V.
  • Azide groups on the OECT surface were successfully utilized for clicking alkyne-bearing molecules, including redox probes and biotinylated linkers.
  • Demonstrated efficient bioconstruct formation using avidin-biotin interactions and developed an aptasensor for thrombin detection.

Conclusions:

  • The developed "clickable" OECTs offer a robust platform for versatile bio-functionalization.
  • These OECTs maintain their electronic properties after conjugation, highlighting their stability for bioelectronic applications and biosensor development.