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Related Concept Videos

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...
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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...
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Subatomic Particles03:37

Subatomic Particles

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Dalton was only partially correct about the particles that make up matter. All matter is composed of atoms, and atoms are composed of three smaller subatomic particles: protons, neutrons, and electrons. These three particles account for the mass and the charge of an atom.
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Uncertainty in Measurement: Accuracy and Precision03:37

Uncertainty in Measurement: Accuracy and Precision

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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value. 
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Silica Gel Column Chromatography: Overview01:10

Silica Gel Column Chromatography: Overview

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Silica gel column chromatography is a technique for separating compounds using a column packed with silica gel as the stationary phase. This method relies on differences in the polarity of compounds. Based on their polarities, compounds move between the stationary phase (silica gel) and the mobile phase (the solvent), forming discrete bands in the column.
Polar components tend to bind strongly to the silica gel, causing them to move slowly through the column. In contrast, nonpolar compounds...
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Updated: Jan 23, 2026

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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Precisely Endowing Colloidal Particles with Silica Branches.

Bin Zhao1,2, Dongzhi Li1, Yue Long3

  • 1Key Laboratory of Bio-Inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 100190, Beijing, China.

Scientific Reports
|June 15, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel method to grow silica rods on colloidal particles. This technique controls silica deposition in a water/n-pentanol system, enabling the creation of complex, branched colloidal structures.

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Synthesis and Characterization of Supramolecular Colloids
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Area of Science:

  • Materials Science
  • Colloid Chemistry
  • Nanotechnology

Background:

  • Colloidal particles are fundamental building blocks in materials science.
  • Controlling the surface morphology of colloidal particles is crucial for advanced applications.
  • Existing methods for particle modification often lack precise control over deposition.

Purpose of the Study:

  • To develop a new method for modifying colloidal particles with silica rods.
  • To investigate the mechanism of silica rod growth on particle surfaces.
  • To achieve controlled branching and complex structures on colloidal particles.

Main Methods:

  • Utilizing a water/n-pentanol solvent system with colloidal particles.
  • Exploiting interfacial tension to induce dewetting of water droplets around particles.
  • Controlling silica hydrolysis conditions to direct rod growth.

Main Results:

  • Silica rods were observed to grow perpendicularly on colloidal particle surfaces.
  • Unidirectional deposition occurred at sites of minimal curvature where water dewetted.
  • By tuning hydrolysis, particles with tunable branching (e.g., rambutan-like) were produced.

Conclusions:

  • A facile method for creating silica-branched colloidal particles was established.
  • The process allows for precise control over the architecture of modified colloids.
  • This approach offers new possibilities for designing complex colloidal systems.