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Related Concept Videos

Colloidal precipitates01:09

Colloidal precipitates

The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
Coagulation01:06

Coagulation

Colloidal solids are solid particles suspended in solution. They are usually negatively charged, attracting a compact primary layer of positively charged ions, which attract more counterions to form an electrical double layer. Electrostatic repulsion between the charged double layers prevents the particles from colliding, stabilizing the colloids. These solids are often undesirable because they can contain toxins that are difficult to remove. Coagulation is a technique that helps aggregate and...
Colloids03:22

Colloids

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...
The Colloidal State01:29

The Colloidal State

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...
Colloids and Suspensions01:17

Colloids and Suspensions

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...
Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

Recrystallization is a purification technique used to separate impurities from solid compounds. In this technique, no chemical reactions occur. Instead, it exploits physical properties only, specifically, the solubility differences between the desired compound and impurities, either at a single temperature or at different temperatures, and under other selected conditions. The solid-solution equilibrium (solubility equilibrium) of each component in the solution represents a binary phase...

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Related Experiment Video

Updated: Jun 23, 2026

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Self-healing colloidal crystals.

Ashlee St John Iyer1, L Andrew Lyon

  • 1School of Chemistry and Biochemistry and Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332-0400, USA.

Angewandte Chemie (International Ed. in English)
|May 21, 2009
PubMed
Summary
This summary is machine-generated.

Soft microgel assemblies exhibit self-healing properties due to unique colloidal and polymeric interactions. These materials form compressed structures, enabling healing without direct particle contact.

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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
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Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

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Last Updated: Jun 23, 2026

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
10:56

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures

Published on: May 20, 2014

Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Polymer Chemistry

Background:

  • Microgels are versatile polymer networks swollen with solvent.
  • Self-assembly is crucial for creating ordered structures from colloidal particles.
  • Understanding inter-particle forces is key to designing functional materials.

Purpose of the Study:

  • To investigate the self-assembly behavior of microgels.
  • To explore the relationship between colloidal/polymeric energetics and self-healing properties.
  • To elucidate the mechanism behind the self-healing capabilities in microgel assemblies.

Main Methods:

  • Utilized principles of colloidal and polymeric energetics.
  • Studied microgel self-assembly into crystalline lattices.
  • Analyzed particle conformations and inter-particle interactions.

Main Results:

  • Demonstrated that repulsive soft spheres form highly compressed conformations in colloidal crystalline lattices.
  • Observed that particles do not directly contact nearest neighbors.
  • Identified this 'distant action' as the mechanism responsible for self-healing.

Conclusions:

  • The interplay of colloidal and polymeric energetics drives microgel self-assembly.
  • Microgel assemblies possess intrinsic self-healing properties.
  • Compression and distant interactions are key to the observed self-healing phenomenon.