Issue |
EPL
Volume 149, Number 2, January 2025
|
|
---|---|---|
Article Number | 27001 | |
Number of page(s) | 6 | |
Section | Biological and soft matter physics | |
DOI | https://doi.org/10.1209/0295-5075/ada635 | |
Published online | 23 January 2025 |
Shape, temperature and density interplay in depletion forces
Donostia International Physics Center 20018 Donostia, Spain and Department of Physics and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University Ramat-Gan 52900, Israel
Received: 20 September 2024
Accepted: 6 January 2025
Via numerical simulations, depletion forces are studied in mixtures of small and big particles that interact via a soft repulsive potential for a wide range of densities and temperatures. While big particles are spherical, small particles are nonspherical with shapes that vary gradually, from squares to rods via intermediate shapes. Depletion forces and their resulting potentials depend on the interplay of shape, temperature and density, an argument that is elaborated qualitatively and quantitatively. While in some thermodynamic conditions, depletion potentials of distinct shapes are distinguishable, in different conditions, they are very similar. Finally, novel computational models and experiments are proposed for further investigation of the effect of particle morphology on phase separation in and out of thermal equilibrium.
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