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Updated: Jun 16, 2026

Synthesis and Characterization of Supramolecular Colloids

Synthesis and Characterization of Supramolecular Colloids

Published on: April 22, 2016

Binary colloidal mixtures in near-critical binary solvents.

Nima Farahmand Bafi¹, Robert Evans², Anna Maciołek^1,3

¹Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, PL-01-224 Warsaw, Poland.

The Journal of Chemical Physics

|June 15, 2026

Summary

This summary is machine-generated.

This study explores colloidal mixtures in near-critical solvents, revealing how interactions and packing influence phase diagrams. The findings offer insights into controlling colloidal self-assembly via temperature-tuned solvent properties.

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Area of Science:

Colloid and Interface Science
Soft Matter Physics
Thermodynamics

Background:

Phase behavior of colloids in near-critical solvents is complex.
Previous models focused on single colloid types in 2D.
Recent experiments explore composite colloidal assembly.

Purpose of the Study:

Investigate the phase behavior of binary colloidal mixtures in a near-critical solvent.
Extend a mean-field lattice model to three dimensions for a four-component system.
Analyze the impact of colloid-solvent and colloid-colloid interactions on phase diagrams.

Main Methods:

Extended a 2D mean-field lattice model to 3D.
Modeled a four-component mixture including two colloid types (C1, C2) and a binary solvent (A, B).
C1 and C2 are hard spheres with differing affinities for solvent species B.

Main Results:

Significant changes in colloidal phase diagram topology were observed with varying relative volume fractions of C1 and C2.
The interplay of colloid-solvent, solvent-solvent interactions, and hard sphere packing drives these changes.
The behavior of triple point lines was particularly noteworthy.

Conclusions:

The study provides insights into controlling colloidal self-assembly of "alloys" using near-critical solvents.
Temperature-controlled, reversible self-assembly is achievable.
The model offers a framework for understanding complex colloidal mixtures near critical points.