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Related Concept Videos

The Colloidal State01:29

The Colloidal State

91
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...
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Colloids03:22

Colloids

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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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Colloids and Suspensions01:17

Colloids and Suspensions

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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...
3.8K
Colloidal precipitates01:09

Colloidal precipitates

6.8K
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...
6.8K
Coagulation01:06

Coagulation

1.6K
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...
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Structures of Solids02:22

Structures of Solids

20.9K
Solids in which the atoms, ions, or molecules are arranged in a definite repeating pattern are known as crystalline solids. Metals and ionic compounds typically form ordered, crystalline solids. A crystalline solid has a precise melting temperature because each atom or molecule of the same type is held in place with the same forces or energy. Amorphous solids or non-crystalline solids (or, sometimes, glasses) which lack an ordered internal structure and are randomly arranged. Substances that...
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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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Fractal-like structures in colloid science.

S Lazzari1, L Nicoud2, B Jaquet2

  • 1Department of Chemical Engineering, Massachusetts Institute of Technology, 77, Massachusetts Avenue, Cambridge, MA 02139, USA.

Advances in Colloid and Interface Science
|May 29, 2016
PubMed
Summary
This summary is machine-generated.

This review explores fractal structures in colloid aggregation, discussing methods to measure fractal dimension (df) and its role in creating novel materials from organic/inorganic particles and proteins.

Keywords:
AggregateClusterColloidFractalMaterials

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Area of Science:

  • Colloid and Surface Science
  • Materials Science
  • Biophysics

Background:

  • Fractal structures are prevalent in colloid aggregation.
  • Understanding these structures is key to developing new materials.

Purpose of the Study:

  • To review current knowledge of fractal structures in colloid aggregation.
  • To discuss the potential for creating novel structured materials.
  • To critically analyze methods for measuring fractal dimension (df).

Main Methods:

  • Critical discussion of techniques for measuring fractal dimension (df).
  • Analysis of aggregation conditions influencing df.
  • Review of recent literature findings.

Main Results:

  • Existing techniques for df measurement are critically evaluated for organic/inorganic particles and proteins.
  • Aggregation conditions impacting df are thoroughly analyzed.
  • Current understanding and limitations are highlighted.

Conclusions:

  • Fractal dimension (df) is crucial for understanding colloid aggregation.
  • Fractal structures offer significant potential for novel material production.
  • Future research directions for new structured materials are proposed.