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Related Concept Videos

Colloids03:22

Colloids

21.6K
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...
21.6K
Colloids and Suspensions01:17

Colloids and Suspensions

3.6K
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...
3.6K
Colloidal precipitates01:09

Colloidal precipitates

6.6K
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...
6.6K

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Related Experiment Video

Updated: Feb 25, 2026

Synthesis and Characterization of Supramolecular Colloids
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Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

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Crosslinking of floating colloidal monolayers.

Steffen Kurzhals1, Michael Süss1, Jelena Pejovic1,2

  • 1Department of Nanobiotechnology, University of Natural Resources and Life Sciences Vienna, Muthgasse 11, 1190 Vienna, Austria.

Monatshefte Fur Chemie
|July 29, 2017
PubMed
Summary
This summary is machine-generated.

Researchers created crosslinked colloidal membranes from polystyrene beads. This simple, fast method yields large-area membranes with tunable nanopores for applications like drug delivery and filtration.

Keywords:
AnnealingAssemblyColloidsCrystal structureElectron microscopyNanostructures

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Area of Science:

  • Materials Science and Engineering
  • Nanotechnology
  • Colloid Science

Background:

  • Crosslinked colloidal monolayers offer potential in diverse applications including templates, lithographic masks, and controlled release membranes.
  • Existing fabrication methods may lack efficiency or scalability for producing large-area, defect-free membranes.

Purpose of the Study:

  • To develop an efficient and simple method for fabricating large-area crosslinked colloidal membranes.
  • To investigate the crosslinking of polystyrene (PS) bead monolayers at the air/water interface.
  • To characterize the resulting membranes for potential applications in filtration and drug delivery.

Main Methods:

  • Assembly of monodisperse micron-sized polystyrene beads at an air/water interface.
  • Transformation into crystalline monolayers using surface-active agents.
  • Vapor annealing with solvents (toluene, xylene) and crosslinking agents (divinylbenzene) for in-situ crosslinking.

Main Results:

  • Successful fabrication of crosslinked membranes with crystal sizes up to 44 cm² and domain sizes up to 1.9 mm².
  • Generation of membranes with controlled nano-sized pores (100-300 nm).
  • Demonstration of a short fabrication time using a simple experimental setup.

Conclusions:

  • The demonstrated method provides a facile and rapid route to large-area crosslinked colloidal membranes.
  • These membranes exhibit tunable nanoporous structures suitable for advanced applications.
  • The approach holds promise for scalable manufacturing of functional membranes.