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Related Concept Videos

Colloids03:22

Colloids

20.5K
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...
20.5K
Colloidal precipitates01:09

Colloidal precipitates

4.7K
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...
4.7K
Colloids and Suspensions01:17

Colloids and Suspensions

3.0K
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...
3.0K
Coagulation01:06

Coagulation

1.2K
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...
1.2K

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Related Experiment Video

Updated: Jan 9, 2026

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

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Optical Colloidal Assembly.

Shao-Feng Liu1, Kent Nguyen2, Linhan Lin1

  • 1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Haidian, Beijing 100084, China.

Chemical Reviews
|December 9, 2025
PubMed
Summary
This summary is machine-generated.

Optical colloidal assembly uses light to precisely arrange and bond particles, enabling the creation of advanced materials and devices with high resolution.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physical Chemistry

Background:

  • Colloidal particles are versatile building blocks for novel materials due to their tunable properties.
  • Optical colloidal assembly offers high spatial and temporal resolution for particle arrangement.
  • This method involves optical manipulation for positioning and light-triggered bonding for immobilization.

Purpose of the Study:

  • To review and categorize optical manipulation techniques for colloidal assembly.
  • To provide a comprehensive overview of various colloidal bonding schemes.
  • To summarize applications and future directions in optical colloidal assembly.

Main Methods:

  • Categorization of optical manipulation techniques based on working principles.
  • Overview of interparticle bonding schemes (van der Waals, dipole-dipole, biochemical, photopolymerization, ligand bonding).
  • Summary of applications and future challenges in the field.

Main Results:

  • Detailed discussion of different optical manipulation methods and their assembly capabilities.
  • Comprehensive analysis of diverse colloidal bonding strategies.
  • Highlighting cutting-edge applications of assembled colloidal structures.

Conclusions:

  • Optical colloidal assembly is a powerful technique for fabricating advanced materials.
  • Further research is needed to address existing challenges and unlock future potential.
  • This review provides a roadmap for the field's development.