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Colloidal precipitates

Colloidal precipitates

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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Updated: Jun 24, 2026

Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method

Gold Nanostar Synthesis with a Silver Seed Mediated Growth Method

Published on: January 15, 2012

Colloidal gold and silver triangular nanoprisms.

Jill E Millstone¹, Sarah J Hurst, Gabriella S Métraux

¹Department of Chemistry and International Institute of Nanotechnology 2145 Sheridan Road, Evanston, IL 60208, USA.

Small (Weinheim an Der Bergstrasse, Germany)

|March 24, 2009

Summary

This summary is machine-generated.

Researchers review solution-based synthesis methods for triangular gold and silver nanoprisms. These anisotropic nanomaterials offer unique optical and energetic properties, with potential applications in catalysis and medicine.

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Area of Science:

Materials Science
Nanotechnology
Chemistry

Background:

Nanomaterial properties depend on size, shape, and composition.
Anisotropic particles exhibit unique chemical and physical behaviors due to reduced symmetry.
Triangular gold (Au) and silver (Ag) nanoprisms are of significant interest.

Purpose of the Study:

To review solution-based synthesis methods for triangular Au and Ag nanoprisms.
To discuss proposed formation mechanisms for these anisotropic nanoparticles.
To highlight the unique properties and potential applications of these nanomaterials.

Main Methods:

Review of various solution-based synthesis techniques.
Analysis of proposed mechanisms for nanoprism formation.
Discussion of structure-property relationships.

Main Results:

Established synthetic routes enable bulk production of triangular Au and Ag nanoprisms.
Control over edge length and thickness is achievable.
Nanoprisms exhibit structure- and environment-dependent optical features and anisotropic surface energetics.

Conclusions:

Reliable synthetic methods for triangular Au and Ag nanoprisms are available.
These anisotropic nanomaterials possess unique optical and energetic properties.
Potential applications span catalysis, medicine, and other advanced technologies.