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Related Concept Videos

The Colloidal State01:29

The Colloidal State

167
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...
167
Colloidal precipitates01:09

Colloidal precipitates

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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...
6.9K
Coagulation01:06

Coagulation

1.8K
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...
1.8K
Colloids03:22

Colloids

22.2K
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...
22.2K
Colloids and Suspensions01:17

Colloids and Suspensions

4.0K
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...
4.0K
Ion Exchange01:17

Ion Exchange

1.6K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.6K

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Related Experiment Video

Updated: Apr 20, 2026

Creating Sub-50 Nm Nanofluidic Junctions in PDMS Microfluidic Chip via Self-Assembly Process of Colloidal Particles
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Polyelectrolyte complex-silica hybrid colloidal particles decorated with different polyelectrolytes.

Jin-Jia Hu1, Yi-Hsuan Hsieh2, Jeng-Shiung Jan2

  • 1Department of Biomedical Engineering, National Cheng Kung University, Tainan 701, Taiwan.

Journal of Colloid and Interface Science
|December 3, 2014
PubMed
Summary

Researchers created hybrid colloidal particles using polyelectrolyte complex micelles for silica mineralization. This method allows tuning particle properties by altering polymer composition and synthesis conditions.

Keywords:
Hybrid colloidal particlesPolyelectrolyte complexPolypeptideSilica

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Area of Science:

  • Materials Science
  • Colloid Science
  • Polymer Chemistry

Background:

  • Polyelectrolyte complexes (PECs) are formed by electrostatic interactions between oppositely charged polymers.
  • PEC micelles can serve as templates for synthesizing hybrid nanomaterials.
  • Controlling the properties of hybrid colloidal particles is crucial for various applications.

Purpose of the Study:

  • To synthesize polyelectrolyte-decorated hybrid colloidal particles using PEC micelles as templates.
  • To investigate the effect of polyelectrolyte composition and synthesis conditions on particle properties.
  • To demonstrate a facile method for creating tunable hybrid colloidal particles.

Main Methods:

  • Formation of negatively charged PEC micelles using poly(acrylic acid) (PAA), poly(L-glutamic acid) (PLGA), or poly(styrene sulfonate) (PSS) complexed with poly(L-lysine).
  • Silica mineralization within the PEC micelle core under ambient conditions.
  • Tuning particle size and charge by varying polyelectrolyte mixing ratios and molecular weights.

Main Results:

  • Successfully synthesized colloidally stable hybrid colloidal particles decorated with various negatively charged polyelectrolytes.
  • Demonstrated that particle size and charge can be controlled by adjusting polyelectrolyte composition and molecular weight.
  • Confirmed that the colloidal properties of the hybrid particles are dependent on their composition and the specific decorating polyelectrolyte.

Conclusions:

  • A simple and facile method for preparing polymer-decorated hybrid colloidal particles was developed.
  • The synthesized hybrid particles exhibit tunable colloidal properties.
  • This approach offers a versatile platform for creating functional hybrid materials with tailored characteristics.