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Related Concept Videos

Colloids03:22

Colloids

21.7K
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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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...
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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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Crystal Growth: Principles of Crystallization01:25

Crystal Growth: Principles of Crystallization

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Crystallization is a phase transformation process in which crystals are precipitated from a supersaturated solution or formed from other sources. During crystallization, atoms or molecules arrange themselves into a well-defined, rigid crystal lattice to minimize energy.
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Recrystallization: Solid–Solution Equilibria01:10

Recrystallization: Solid–Solution Equilibria

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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: Feb 26, 2026

Synthesis and Characterization of Supramolecular Colloids
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Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

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Assembly of multi-flavored two-dimensional colloidal crystals.

Nathan A Mahynski1, Hasan Zerze, Harold W Hatch

  • 1Chemical Sciences Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8320, USA. nathan.mahynski@nist.gov.

Soft Matter
|July 14, 2017
PubMed
Summary
This summary is machine-generated.

Researchers explored binary multi-flavored colloidal mixtures, finding tunable self-assembly into diverse structures without high pressure or anisotropic interactions. This offers new pathways for designing colloidal crystals.

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Area of Science:

  • Materials Science
  • Soft Matter Physics
  • Colloidal Science

Background:

  • Colloidal self-assembly into complex lattices often requires high pressures or anisotropic interactions.
  • Traditional binary mixtures have fixed interaction rules, limiting design flexibility.

Purpose of the Study:

  • To investigate the self-assembly of binary multi-flavored colloidal mixtures in two dimensions.
  • To demonstrate tunable assembly into diverse structures by independently tuning pairwise interactions.

Main Methods:

  • Development of a minimal model with a three-dimensional phase space for pairwise interactions.
  • Utilizing computational techniques to map self-assembled structures within the phase space.
  • Presentation of a mean-field model to reproduce and predict assembly behavior.

Main Results:

  • Demonstration of tunable assembly into a variety of structures without high pressure or anisotropic interactions.
  • Identification of how to target different structures by tuning pairwise interactions and stoichiometry.
  • Characterization of the effect of particle size asymmetry on lattice stability.

Conclusions:

  • The developed models provide a design tool for engineering binary colloidal crystals.
  • Independent tuning of pairwise interactions offers new avenues for directed self-assembly.
  • The mean-field model accurately predicts assembly for size-symmetric mixtures and estimates stability for asymmetric ones.