Self-assembly of trimer colloids: effect of shape and interaction range

Area of Science:

• Colloid science
• Materials science
• Computational chemistry

Background:

• Patchy colloids are model systems for studying self-assembly.
• Trimer colloids with specific interaction sites are of recent synthetic interest.
• Understanding self-assembled structures is crucial for designing novel materials.

Purpose of the Study:

• To simulate and identify stable self-assembled structures of trimer patchy colloids.
• To apply the extended corresponding states principle to colloidal systems.
• To compare simulation findings with experimental data and predict new structures.

Main Methods:

• Flat-histogram Monte Carlo simulations were employed.
• Systematic variation of trimer geometry and interaction potentials.
• Application and validation of the extended corresponding states principle.

Main Results:

• Diverse self-assembled structures were observed, including spherical clusters, elongated clusters, monolayers, and spherical shells.
• The extended corresponding states principle successfully collapsed simulation data for models with the same shape but different interaction ranges.
• Good agreement was found between simulation results and previous experimental data.

Conclusions:

• The extended corresponding states principle provides a valuable tool for comparing simulations and experiments in colloidal self-assembly.
• The study predicts the formation of self-assembled structures for trimer shapes not yet experimentally synthesized.
• This work facilitates the design and synthesis of new materials based on colloidal self-assembly.