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From binary AB to ternary ABC supraparticles.

E Deniz Eren1, Mohammad-Amin Moradi1, Mark M J van Rijt1

  • 1Laboratory of Physical Chemistry and Center for Multiscale Electron Microscopy, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands. G.deWith@tue.nl.

Materials Horizons
|July 27, 2022
PubMed
Summary
This summary is machine-generated.

Researchers controlled nanoscale assembly by combining different nanoparticles. This hierarchical self-assembly method created novel binary (AB) and ternary (ABC) supraparticles with tunable structures for advanced nanomaterials.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Colloid Science

Background:

  • Precise control over nanoscale functional building block assembly is crucial for developing advanced hybrid and porous nanomaterials.
  • The organization of nanoparticles in supraparticles is significantly influenced by the size ratios of the constituent building blocks.

Purpose of the Study:

  • To investigate the hierarchical self-assembly of multi-component supraparticles with controlled structures.
  • To explore the formation of binary (AB) and ternary (ABC) supraparticles using nanoparticles of different sizes and types.
  • To understand the relationship between nanoparticle size ratio, electrostatic interactions, and supraparticle morphology.

Main Methods:

  • Colloidal self-assembly of small silica nanoparticles (SiO2 NPs) onto large polystyrene latex nanoparticles (PSL NPs).
  • Controlled manipulation of electrostatic interactions and nanoparticle concentrations to achieve desired coverage (complete or partial).
  • Cryo-electron tomography for 3D visualization and structural analysis of binary and ternary supraparticles.

Main Results:

  • Successfully synthesized stable, hierarchically ordered binary (AB) supraparticles with tunable coverage using SiO2 NPs on PSL NPs.
  • Demonstrated the creation of novel ternary (ABC) supraparticles by utilizing partially covered AB supraparticles as templates.
  • Experimentally confirmed ABC supraparticle formation using iron oxide (Fe3O4) and silica nanoparticles as shell components on polystyrene cores.

Conclusions:

  • Hierarchical self-assembly offers a versatile approach to control supraparticle architecture and morphology.
  • Partially covered binary supraparticles serve as effective platforms for constructing complex ternary supraparticles.
  • The developed method enables the precise engineering of multi-component nanomaterials with potential applications in various fields.