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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...

Colloids

Colloids

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...

Colloids and Suspensions

Colloids and Suspensions

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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Updated: Feb 19, 2026

Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles

Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles

Published on: November 14, 2018

Polydopamine Based Colloidal Materials: Synthesis and Applications.

Ziwei Deng¹, Bin Shang¹, Bo Peng²

¹Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710062, China.

Chemical Record (New York, N.Y.)

|November 11, 2017

Summary

This summary is machine-generated.

Polydopamine, a melanin-like polymer, offers strong adhesion and versatile reactivity for creating advanced colloidal materials. This review covers its synthesis, mechanisms, and diverse applications in fields like biomedicine and energy.

Keywords:

applications colloids polydopamine surface modification synthesis design

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Area of Science:

Materials Science
Polymer Chemistry
Nanotechnology

Background:

Polydopamine (PDA) is a synthetic melanin analogue.
It exhibits strong adhesion, reactivity, biocompatibility, and biodegradability.
PDA serves as a versatile linker for synthesizing colloidal materials.

Purpose of the Study:

To review synthetic approaches and polymerization mechanisms of polydopamine.
To provide a comprehensive overview of polydopamine-based colloidal materials.
To discuss recent advancements and future perspectives in PDA applications.

Main Methods:

Oxidative polymerization of dopamine.
Synthesis of polydopamine-based colloidal materials.
Literature review of recent progress and applications.

Main Results:

Polydopamine enables the creation of diverse colloidal materials with tunable properties.
These materials demonstrate broad applicability in biomedicine, sensing, catalysis, environment, and energy.
Various synthetic strategies and polymerization mechanisms are discussed.

Conclusions:

Polydopamine is a highly versatile platform for advanced material development.
Its unique properties facilitate innovative solutions across multiple scientific disciplines.
Future research holds significant potential for expanding polydopamine applications.