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The Colloidal State

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The formation of a colloidal system is exemplified by an aqueous solution containing Cl− ions is introduced to another containing Ag+ ions, resulting in the precipitation of solid AgCl as extremely tiny crystals. Instead of settling out as a filterable precipitate, these crystals remain suspended in the liquid, showcasing a colloidal system.A colloidal system involves colloidal particles within the approximate range of 1 to 1000 nm in at least one dimension, dispersed in a medium called the...

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles that are visible to the naked eye or can be seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. On the other hand, a solution is a homogeneous mixture in which no settling occurs and in which the dissolved...

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Children at play often make suspensions such as mixtures of mud and water, flour and water, or a suspension of solid pigments in water known as tempera paint. These suspensions are heterogeneous mixtures composed of relatively large particles visible to the naked eye or seen with a magnifying glass. They are cloudy, and the suspended particles settle out after mixing. The suspended particles in a suspension settle out after some time of mixing. The separation of particles from a suspension is...

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Updated: Jun 3, 2026

Synthesis and Characterization of Supramolecular Colloids

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Monodisperse functional colloidosomes with tailored nanoparticle shells.

J S Sander¹, A R Studart

¹Complex Materials, Department of Materials, ETH Zurich, 8093, Zurich, Switzerland.

Langmuir : the ACS Journal of Surfaces and Colloids

|March 10, 2011

Summary

This summary is machine-generated.

Researchers created functional hollow capsules called colloidosomes using microfluidic devices. This method allows for easy incorporation of various nanoparticles, enabling diverse shell properties for advanced applications.

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Area of Science:

Materials Science
Nanotechnology
Chemical Engineering

Background:

Colloidosomes are hollow capsules formed by self-assembly of colloidal particles.
Fabricating functional colloidosomes with specific properties remains a challenge.

Purpose of the Study:

To develop a microfluidic method for assembling monodisperse colloidosomes with functional nanoparticle shells.
To demonstrate the incorporation of various functional nanoparticles for diverse shell properties.

Main Methods:

Utilized a double emulsion templating method within a microfluidic device.
Controlled nanoparticle surface chemistry and liquid interface properties for successful assembly.

Main Results:

Successfully assembled monodisperse colloidosomes with shells containing functional nanoparticles.
Demonstrated the ability to create shells with inert, magnetic, photocatalytic, biocompatible, and piezoelectric properties.
Highlighted the importance of surface chemistry and interface control.

Conclusions:

The microfluidic double emulsion method provides a versatile route for fabricating functional colloidosomes.
This technique enables the creation of tailored hollow capsules for various advanced applications.