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Related Concept Videos

Colloidal precipitates01:09

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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Platinum nanoparticles from size adjusted functional colloidal particles generated by a seeded emulsion

Nicolas Vogel1, Ulrich Ziener, Achim Manzke

  • 1Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.

Beilstein Journal of Nanotechnology
|October 18, 2011
PubMed
Summary
This summary is machine-generated.

This study combines miniemulsion and emulsion polymerization to create functional seed particles. This method enables controlled synthesis of highly ordered platinum nanoparticle arrays with tunable interparticle distances.

Keywords:
colloid lithographyfunctional colloidsminiemulsion polymerizationnanoparticlesseeded emulsion polymerization

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Area of Science:

  • Polymer Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Combining miniemulsion and emulsion polymerization offers synergistic benefits.
  • Functional seed particles are crucial for controlled polymerization.
  • Platinum nanoparticles have diverse applications in catalysis and electronics.

Purpose of the Study:

  • To investigate a seeded emulsion polymerization process using functional seed particles.
  • To systematically study reaction parameters influencing particle synthesis.
  • To develop a method for fabricating ordered platinum nanoparticle arrays with controlled spacing.

Main Methods:

  • Synthesized functional seed particles via miniemulsion polymerization.
  • Conducted seeded emulsion polymerization, varying monomer feed, initiator ratio, surfactant, and continuous phase composition.
  • Prepared latex particles with platinum precursor and controlled shell thickness.
  • Fabricated ordered platinum nanoparticle arrays using self-assembly, oxygen plasma treatment, and annealing.

Main Results:

  • Identified critical parameters for controlling seeded emulsion polymerization.
  • Achieved monodisperse particles with adjustable size and functionality.
  • Produced arrays of highly ordered platinum nanoparticles with tunable interparticle distances (up to 260 nm) and uniform particle size.
  • Determined factors influencing the saturation state during plasma processing.

Conclusions:

  • The developed seeded emulsion polymerization method allows precise control over particle characteristics.
  • This approach is effective for fabricating ordered platinum nanoparticle arrays.
  • Plasma processing parameters and precursor loading influence the final nanoparticle arrangement and spacing.