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Related Concept Videos

Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

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Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
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Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
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Related Experiment Video

Updated: Oct 19, 2025

AC Electrokinetic Phenomena Generated by Microelectrode Structures
20:38

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Published on: July 28, 2008

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Phase-controlled field-effect micromixing using AC electroosmosis.

Paresa Modarres1, Maryam Tabrizian1,2

  • 1Biomedical Engineering Department, McGill University, Montreal, QC Canada.

Microsystems & Nanoengineering
|September 27, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a novel phase-controlled electrokinetic micromixer using AC electroosmosis. It achieves over 90% mixing efficiency for synthesizing uniform nanoparticles for drug delivery.

Keywords:
MicrofluidicsNanoparticles

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Area of Science:

  • Microfluidics
  • Electrokinetics
  • Nanotechnology

Background:

  • Electrokinetic techniques are increasingly used in micro total analysis systems.
  • AC electroosmosis offers unique advantages over traditional methods.

Purpose of the Study:

  • To develop a novel phase-controlled field-effect micromixer using AC electroosmosis.
  • To demonstrate its application in synthesizing nanoscale drug delivery vesicles.

Main Methods:

  • Designed a micromixer with three-finger sinusoidally shaped electrodes.
  • Utilized AC electroosmosis and phase-controlled voltage potentials.
  • Applied the micromixer for electrohydrodynamic-mediated nanoprecipitation.

Main Results:

  • Achieved over 90% mixing efficiency at 4 µL/min flow rate.
  • Demonstrated switching between unmixed (0°) and mixed (180°) states via phase control.
  • Produced nanoparticles with improved monodispersity and concentration.

Conclusions:

  • The phase-controlled electrokinetic micromixer offers precise control over mixing.
  • This technique enhances nanoparticle synthesis for drug delivery applications.