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arXiv 1505.00525cond-mat.soft
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不同扩散系数颗粒的二元混合物

Binary Mixtures of Particles with Different Diffusivities Demix

Simon N. Weber, Christoph A. Weber, Erwin Frey

摘要:

尺寸差异、形状、质量和持续运动对二元混合物相分离的影响已被深入研究。在这里,我们专注于在二元混合物中的扩散率差异的独家作用的大小相等的颗粒。我们发现一个有效的吸引力之间的扩散性较低的粒子,这基本上是笼在周围的物种具有较高的扩散常数。这种效应会导致超过临界尺寸的系统发生相分离:出现一个由扩散性较低的物质组成的单一紧密堆积的簇。实验测试我们的预测进行了概述。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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