Binary Mixtures of Particles with Different Diffusivities Demix
Soft Condensed Matter
2016-03-04 v3
Abstract
The influence of size differences, shape, mass and persistent motion on phase separation in binary mixtures has been intensively studied. Here we focus on the exclusive role of diffusivity differences in binary mixtures of equal-sized particles. We find an effective attraction between the less diffusive particles, which are essentially caged in the surrounding species with the higher diffusion constant. This effect leads to phase separation for systems above a critical size: A single close-packed cluster made up of the less diffusive species emerges. Experiments for testing of our predictions are outlined.
Cite
@article{arxiv.1505.00525,
title = {Binary Mixtures of Particles with Different Diffusivities Demix},
author = {Simon N. Weber and Christoph A. Weber and Erwin Frey},
journal= {arXiv preprint arXiv:1505.00525},
year = {2016}
}
Comments
5 figures in main text, 8 figures in Supplemental Material