Pair interactions between complex mesoscopic particles from Widom's particle-insertion method

TL;DR

This paper presents an efficient application of Widom's particle insertion method to determine effective pair interactions between complex mesoscopic particles in soft matter, validated through three diverse test systems.

Contribution

The study introduces a novel, efficient approach using Widom's particle insertion technique for calculating pair interactions in complex soft-matter particles.

Findings

Method accurately determines pair interactions at zero density.

Validated across amphiphilic dendrimers, electrostatic polymers, and coated colloids.

Demonstrates broad applicability and efficiency of the approach.

Abstract

We demonstrate that Widom's particle insertion technique provides a convenient and efficient method to determine the effective pair interaction between complex, composite soft-matter particles in the zero-density limit. By means of three different test systems, i.e. amphiphilic dendrimers, electrostatic polymers and colloids coated with electrostatic polymers, we demonstrate the validity and the power of the presented method.