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  1. Home
  3. Optimizing Stratification In Binary Colloidal Supraparticles.
  1. Home
  3. Optimizing Stratification In Binary Colloidal Supraparticles.

Related Experiment Video

Synthesis and Characterization of Supramolecular Colloids
09:26

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Optimizing Stratification in Binary Colloidal Supraparticles.

Frederic Rudlof1, Silas Wolf2, Sonja Schaller1

  • 1Institute of Interfaces and Particle Technology, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|June 28, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

Stratified binary supraparticles achieve optimal internal structures. Researchers found specific size ratios and volume fractions maximize stratification, crucial for designing advanced functional materials.

Keywords:
CFD‐DEM simulationdiffusiophoresisspray‐dryingstructure formationsupraparticles

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Area of Science:

  • Materials Science
  • Colloid Science
  • Nanotechnology

Background:

  • Stratified binary supraparticles are key for advanced applications like photonics and drug delivery.
  • Predicting the degree of stratification based on particle size and composition is challenging.

Purpose of the Study:

  • To quantify stratification in spray-dried binary supraparticles.
  • To identify optimal conditions for maximal stratification.
  • To understand the underlying mechanisms driving stratification.

Main Methods:

  • Utilized scanning electron microscopy (SEM) image analysis.
  • Employed confocal microscopy for stratification quantification.
  • Performed computational fluid dynamics-discrete element method (CFD-DEM) simulations.

Main Results:

  • Maximal stratification occurs at specific size ratios (around 3-5) and volume fractions, not necessarily with increasing size ratios.
  • Stratification trends are dependent on the relative volume fractions of small particles.
  • Simulations revealed stratification mechanisms: small particle migration at low concentrations and colloidal diffusiophoresis at high concentrations.

Conclusions:

  • Established a framework for predicting and designing supraparticle internal structures.
  • Demonstrated that optimal stratification depends on a balance of size ratio and volume fraction.
  • Provided insights into the physical mechanisms governing stratification in binary colloidal mixtures.