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Related Concept Videos

Redox Reactions01:27

Redox Reactions

1.2K
Redox reactions are vital biochemical processes that underpin energy metabolism in cells. These reactions involve the transfer of electrons between molecules, occurring in tandem as oxidation and reduction. Oxidation refers to the loss of electrons, while reduction denotes their gain. This coupling ensures the seamless flow of electrons through metabolic pathways. For example, in bacterial metabolism, glucose undergoes oxidation to carbon dioxide, while oxygen is simultaneously reduced to...
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Redox Reactions01:24

Redox Reactions

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Oxidation-reduction or redox reactions involve the transfer of electrons from one molecule or atom to another. When an atom gains an electron, another atom must lose an electron, meaning oxidation and reduction must occur together. Since the redox occurs in pairs, the atom that gets oxidized is also called the reducing agent or reductant, and the atom that is reduced is also called the oxidizing agent or oxidant. A straightforward way to remember the definitions of oxidation and reduction is...
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Electrodes: Overview01:17

Electrodes: Overview

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 Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
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Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

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Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
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Redox Titration: Overview01:21

Redox Titration: Overview

5.1K
Redox titration is a chemical analysis technique used to determine the concentration of an unknown substance by measuring the electron transfer in a redox (reduction-oxidation) reaction. The process involves gradually adding a titrant with a known concentration of an oxidizing or reducing agent, to the analyte, the solution with an unknown concentration, until reaching the endpoint, which indicates the completion of the reaction between the two substances. Ensuring the analyte is in a single...
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Related Experiment Video

Updated: Feb 17, 2026

Reductive Electropolymerization of a Vinyl-containing Poly-pyridyl Complex on Glassy Carbon and Fluorine-doped Tin Oxide Electrodes
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High-Capacity Redox Polymer Electrodes: Applications in Molecular and Cellular Processing.

Craig Galligan1, Christopher Nguyen2, John Nelson3

  • 11 Electronics Organization, GE Global Research Center, Niskayuna, NY, USA.

SLAS Technology
|November 30, 2017
PubMed
Summary

New conjugated polymer electrodes offer high capacity and stability for bioprocessing. These PEDOT:PSS electrodes avoid solvent electrolysis, enabling advanced organic electronics in healthcare and pharmaceuticals.

Keywords:
cell lysis and electroporationcell processingclinical automationconjugated and redox polymerelectrokineticselectroosmotic pumpnucleic acid processing and separation

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Area of Science:

  • Organic electronics
  • Electrochemistry
  • Biotechnology

Background:

  • Current organic electronics often use solution casting or printing methods.
  • Metal electrodes in bioprocessing can cause solvent electrolysis, producing unwanted by-products.
  • Existing methods limit electrode performance and applications.

Purpose of the Study:

  • To present novel methods for fabricating high-capacity redox electrodes using conjugated polymer solutions.
  • To demonstrate the integration of these electrodes into various electrokinetic bioprocessing components.
  • To highlight the advantages of these polymer electrodes over traditional metal electrodes.

Main Methods:

  • Fabrication of high-capacity redox electrodes via thick membrane or fiber casting of conjugated polymer solutions (PEDOT:PSS).
  • Integration of electrodes into electrokinetic components: DNA separation/extraction, cellular electroporation/lysis, and electroosmotic pumping.
  • Performance evaluation under applied voltages >100 V and comparison with metal electrodes.

Main Results:

  • PEDOT:PSS electrodes exhibit high charge capacity and stability, operating above 100 V without overoxidation.
  • Electrodes function without solvent electrolysis, avoiding H+, OH-, and H2O2 by-products.
  • Demonstrated superior performance in electrokinetic components, including a low-voltage/high-pressure electroosmotic pump and a novel flow battery.

Conclusions:

  • Novel conjugated polymer electrodes offer significant advantages over metal electrodes for bioprocessing applications.
  • These electrodes enable new possibilities for organic electronics in biology, healthcare, and pharmaceutical fields.
  • The developed techniques pave the way for more efficient and cleaner electrokinetic devices.