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Related Concept Videos

The Electrical Double Layer01:30

The Electrical Double Layer

67
In the region where two bulk phases meet, an intricate electric charge distribution arises due to charge transfer, ion adsorption, molecular orientation, and charge distortion. This complex distribution is commonly referred to as the electrical double layer.When a solid electrode interfaces with ions in an electrolyte solution, the speed of electron transfer dictates the rates of oxidation and reduction. The electrode acquires a charge through the escape of atoms into the solution as cations or...
67

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Translating Extracellular Electron Transfer Activities with Organic Electrochemical Transistors
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Polyelectrolyte Layer-by-Layer Assembly on Organic Electrochemical Transistors.

Anna-Maria Pappa1, Sahika Inal1,2, Kirsty Roy1

  • 1Department of Bioelectronics, Ecole Nationale Supérieure des Mines, CMP-EMSE, MOC , 13541 Gardanne, France.

ACS Applied Materials & Interfaces
|March 7, 2017
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Summary

This study demonstrates how oppositely charged polyelectrolyte multilayers (PEMs) enhance organic electrochemical transistors (OECTs). This biofunctionalization approach offers a versatile platform for advanced bioelectronic applications and biosensing.

Keywords:
conducting polymerlayer-by-layernucleic acidorganic transistorpolyelectrolyte

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Area of Science:

  • Bioelectronics
  • Materials Science
  • Nanotechnology

Background:

  • Organic electrochemical transistors (OECTs) are high-performance electronic transducers.
  • Polyelectrolyte multilayers (PEMs) offer tunable surface properties.
  • Combining PEMs with OECTs can lead to novel bioelectronic platforms.

Purpose of the Study:

  • To investigate the impact of biofunctionalization on OECT operation using PEMs.
  • To explore the mechanism of ion injection into the OECT channel.
  • To establish layer-by-layer (LbL) assembly as a versatile electrode modification tool.

Main Methods:

  • Layer-by-layer (LbL) assembly of oppositely charged PEMs on a conducting polymer channel (PEDOT:PSS).
  • Fabrication of OECTs with PEM coatings.
  • Characterization of PEM-modified OECT performance.

Main Results:

  • PEMs were successfully assembled on the OECT conducting polymer channel.
  • The study provides insights into ion injection mechanisms influenced by charged polymer films.
  • LbL assembly demonstrated versatility in controlling film thickness, softness, roughness, and charge.

Conclusions:

  • LbL assembly is a versatile method for modifying OECT electrodes.
  • Biofunctionalization of OECTs with PEMs enhances their performance for biosensing.
  • This approach facilitates the design of new bioelectronic platforms for diverse applications.