9 years ago
Binary Mixtures of Particles with Different Diffusivities Demix
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.
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https://journals.aps.org
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Partitioning by collision
Shaking a can of mixed nuts sorts them according to size. Mixtures of self-propelling particles of equal size can also undergo demixing, provided they differ in their diffusivities.
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