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Related Concept Videos

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...
Colloids03:22

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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...
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...
Intermolecular Forces and Physical Properties02:56

Intermolecular Forces and Physical Properties

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...
Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility02:34

Comparing Intermolecular Forces: Melting Point, Boiling Point, and Miscibility

Intermolecular forces are attractive forces that exist between molecules. They dictate several bulk properties, such as melting points, boiling points, and solubilities (miscibilities) of substances. Molar mass, molecular shape, and polarity affect the strength of different intermolecular forces, which influence the magnitude of physical properties across a family of molecules.
Temporary attractive forces like dispersion are present in all molecules, whether they are polar or nonpolar. They...

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Updated: Jun 20, 2026

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

Hydrodynamic interactions in a binary-mixture colloidal monolayer.

M Chamorro-Burgos1, Alvaro Domínguez1,2

  • 1Universidad de Sevilla, Física Teórica, Apdo. 1065, 41080 Sevilla, Spain.

Physical Review. E
|June 19, 2026
PubMed
Summary
This summary is machine-generated.

Colloidal monolayers in fluid exhibit anomalous diffusion due to hydrodynamic interactions. A new regime shows big particle diffusion governed by small particle dynamics, challenging Fick's law predictions.

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Fluorescence Recovery after Merging a Droplet to Measure the Two-dimensional Diffusion of a Phospholipid Monolayer
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Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy
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Quantitative and Qualitative Examination of Particle-particle Interactions Using Colloidal Probe Nanoscopy

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Area of Science:

  • Soft matter physics
  • Colloidal science
  • Fluid dynamics

Background:

  • Colloidal monolayers in fluids experience long-range hydrodynamic interactions.
  • These interactions can lead to anomalous collective diffusion and breakdown of Fick's law above a critical length scale.

Purpose of the Study:

  • To investigate the effect of hydrodynamic interactions on a two-component colloidal monolayer.
  • To explore the dynamics of concentration in systems with dissimilar particle types.

Main Methods:

  • Theoretical modeling of a two-component colloidal monolayer.
  • Analysis of hydrodynamic coupling effects on particle dynamics.

Main Results:

  • A novel dynamic regime was identified for systems with highly dissimilar particle types.
  • The effective dynamics of large (slow) particles can follow Fick's law at large scales.
  • The collective diffusivity of large particles is determined by the diffusivity of small (fast) particles via hydrodynamic coupling.

Conclusions:

  • Hydrodynamic interactions significantly influence diffusion in colloidal monolayers.
  • A new regime demonstrates that macroscopic particle behavior can be dictated by microscopic particle properties in binary systems.