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Related Concept Videos

Colloidal precipitates01:09

Colloidal precipitates

6.9K
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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The Colloidal State01:29

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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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In precipitation gravimetry, the precipitating agent should react specifically or selectively with the analyte. While a specific reagent reacts with the analyte alone, a selective reagent can react with a limited number of chemical species.
The obtained precipitate should be either a pure substance of known composition or easily converted to one by a simple process, such as ignition or drying. In addition, the precipitate should be insoluble and easily filterable. In general, filterability...
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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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Synthesis and Characterization of Supramolecular Colloids
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Achieving Site-Specificity in Multistep Colloidal Synthesis.

Yuhua Feng1,2, Yawen Wang1, Jiating He1

  • 1†Division of Chemistry and Biological Chemistry, Nanyang Technological University, Singapore 637371.

Journal of the American Chemical Society
|June 10, 2015
PubMed
Summary
This summary is machine-generated.

Controlling growth dynamics partially inhibits silver (Ag) domain emergence. This leads to novel gold-silver (Au-Ag) sphere-wire-plate nanostructures, enabling advanced material design.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Controlling the growth of nanomaterials is crucial for developing advanced functional architectures.
  • Understanding the dynamics of domain emergence in alloy nanostructures is key to precise synthesis.

Purpose of the Study:

  • To demonstrate partial inhibition of the emerging silver (Ag) domain through controlled growth dynamics.
  • To synthesize novel triblock nanostructures with specific morphologies.

Main Methods:

  • Controlled manipulation of nanoparticle growth dynamics.
  • Utilizing a "fresh" surface to break symmetry during sequential growth.

Main Results:

  • Achieved partial inhibition of the emerging Ag domain.
  • Successfully synthesized (Gold sphere)-(Silver wire)-(Silver plate) triblock nanostructures.
  • Demonstrated the impact of broken symmetry on sequential growth.

Conclusions:

  • Controlling growth dynamics is an effective strategy for tuning nanomaterial properties.
  • The developed method opens new avenues for sophisticated synthetic designs in nanotechnology.
  • The synthesized Au-Ag triblock nanostructures offer potential for future functional applications.