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Related Concept Videos

Centrifugation01:05

Centrifugation

Centrifugation is a separation technique based on differences in density or size. It is commonly used to separate solids from aqueous interferents. During centrifugation, the sample is placed in centrifugation tubes and spun at high angular velocity, which allows centrifugal force to act differentially on the different densities or masses of the components. After spinning, the supernatant liquid is decanted. Depending on the specific application, either the pellet or the supernatant is retained...
Subcellular Fractionation01:32

Subcellular Fractionation

The homogenate obtained after cell lysis contains various membrane-bound organelles that can be further separated into pure fractions by subcellular fractionation. These isolates are used to study specific cellular components, analyze localized protein activity, and are even employed in diagnostics. Fractionation is typically achieved using centrifugation methods, the most common being density-gradient and differential centrifugation.
Differential Centrifugation
Differential centrifugation is...

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Related Experiment Video

Updated: May 28, 2026

Sperm Collection of Differential Quality Using Density Gradient Centrifugation
03:28

Sperm Collection of Differential Quality Using Density Gradient Centrifugation

Published on: November 29, 2018

Gradient porous materials by emulsion centrifugation.

Adham Ahmed1, Jennifer Smith, Haifei Zhang

  • 1Department of Chemistry, University of Liverpool, Liverpool, L69 7ZD, UK.

Chemical Communications (Cambridge, England)
|October 1, 2011
PubMed
Summary

Centrifugation of oil-in-water emulsions creates gradient droplet distributions. Freezing or polymerization locks this structure, yielding gradient porous materials after solvent removal.

Area of Science:

  • Materials Science
  • Chemical Engineering

Background:

  • Gradient porous materials offer unique properties for various applications.
  • Traditional methods for creating porous materials often lack precise control over pore size distribution.

Purpose of the Study:

  • To develop a novel method for fabricating gradient porous materials.
  • To control the spatial distribution of porosity within materials.

Main Methods:

  • Centrifugation of oil-in-water emulsions to achieve gradient droplet distribution.
  • Stabilization of the gradient structure via freezing or polymerization.
  • Solvent removal to generate the final porous material.

Main Results:

  • Successfully generated materials with a defined gradient in porosity.

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  • Demonstrated control over the pore structure through emulsion centrifugation.

    • Conclusions:

    • Centrifugal processing of emulsions provides an effective route to gradient porous materials.
    • This technique offers a new pathway for designing advanced porous structures.