Effect of Patch Area and Interaction Length on Clusters and Structures Formed by One-Patch Particles in Thin Systems.

Area of Science:

• Condensed Matter Physics
• Computational Chemistry
• Materials Science

Background:

• Understanding particle interactions is crucial for predicting material properties.
• The Kern-Frenkel potential models inter-particle forces, influencing self-assembly.
• Confined systems exhibit unique structural behaviors compared to bulk.

Purpose of the Study:

• To investigate cluster and structure formation of one-patch particles between parallel walls.
• To explore the influence of interaction length and system conditions (isothermal-isochoric, isothermal-isobaric) on particle assembly.
• To characterize the specific lattice structures formed under varying pressures and interaction potentials.

Main Methods:

• Utilizing Monte Carlo simulations to model particle behavior.
• Applying the Kern-Frenkel potential to define inter-particle interactions.
• Analyzing cluster formation and lattice structures in confined geometries.

Main Results:

• Short interaction lengths yield tetrahedral tetramers, octahedral hexamers, and pentagonal dipyramidal heptamers with increasing patch area.
• High pressure in isothermal-isobaric systems leads to double layers forming a triangular lattice (fcc (111) face).
• Long interaction lengths produce trigonal prismatic hexamers, and double layers form simple hexagonal or square lattices (fcc (100) face).

Conclusions:

• The Kern-Frenkel potential and confinement effects significantly influence the self-assembly of one-patch particles.
• System parameters like pressure and interaction length control the transition between different cluster geometries and lattice structures.
• This study provides insights into the design principles for creating ordered structures in confined environments.