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Capillary Electrophoresis: Instrumentation01:20

Capillary Electrophoresis: Instrumentation

234
Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
234
Capillary Electrophoresis: Applications01:30

Capillary Electrophoresis: Applications

397
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
397

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Related Experiment Video

Updated: Jul 2, 2025

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets
08:20

Capillary-based Centrifugal Microfluidic Device for Size-controllable Formation of Monodisperse Microdroplets

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A Simple Non-Embedded Single Capillary Device for On-Demand Complex Emulsion Formation.

Mohammad Mahdi Karim Khani1, Mehrnaz Oveysi1, Vahid Bazargan1

  • 1School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran 4399-57131, Iran.

Micromachines
|February 24, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a simple droplet generator for creating complex emulsions on demand. This device allows for precise control over double and higher-order emulsions, paving the way for advanced material fabrication.

Keywords:
capillarycomplex emulsiondouble emulsion

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Area of Science:

  • Fluid dynamics
  • Materials science
  • Chemical engineering

Background:

  • Producing complex emulsions with multiple cores or specific structures is challenging.
  • Existing methods often lack precise control over droplet formation and morphology.

Purpose of the Study:

  • To design, fabricate, and test a rudimentary droplet generator for controlled emulsion production.
  • To investigate the physics of double droplet formation and break-up.
  • To predict droplet morphology based on interfacial tension ratios and flow parameters.

Main Methods:

  • Fabrication of a capillary-based droplet generator.
  • Experimental observation of pendant double droplet formation.
  • Analysis of force equilibrium during droplet break-up.
  • Calculation of shell thickness based on flow rates and formation time.

Main Results:

  • Successfully generated double droplets through a controlled pinching-off process.
  • Demonstrated the ability to tailor emulsion morphology by manipulating interfacial tension.
  • Developed a method to calculate shell thickness in core-shell structures.

Conclusions:

  • The developed droplet generator offers a simple and promising platform for producing double and higher-order emulsions.
  • This technology enables controlled manufacturing of complex emulsions for diverse applications.
  • Potential applications include microparticle fabrication and studying emulsion dynamics.