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Related Experiment Video

Updated: Jan 5, 2026

Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles

Liquid-cell Transmission Electron Microscopy for Tracking Self-assembly of Nanoparticles

Published on: October 16, 2017

Geometric effects in random assemblies of ellipses.

Jakov Lovrić¹, Sara Kaliman, Wolfram Barfuss

¹Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia.

|October 23, 2019

Summary

This study analyzes 2D assemblies of elliptical particles, revealing geometric differences from 3D systems. Findings offer a reference for understanding complex active matter, including biological systems.

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Area of Science:

Physics
Materials Science
Complex Systems

Background:

Anisotropic particle assemblies are key in active many-body systems.
Geometric effects of finite density in 2D assemblies remain unclear.

Purpose of the Study:

To fully characterize geometric ramifications in 2D anisotropic particle assemblies.
To provide a reference for identifying geometric effects in complex systems.

Main Methods:

Generated random assemblies via slow compression of frictionless elliptical particles.
Analyzed configurations using Set Voronoi tessellation accounting for particle shape.
Examined scalar and vectorial morphological measures and their correlations.

Main Results:

Identified similarities with 3D assemblies in limited parameter ranges.
Found significant differences across broad aspect ratios and packing fractions.
Systematically explored correlations between morphological measures.

Conclusions:

2D anisotropic particle assemblies exhibit unique geometric properties distinct from 3D systems.
The study provides a reference dataset for complex systems, including biological matter.
Geometric effects are crucial for understanding active and soft particle systems.