Ensembles of magnetic colloids can undergo an instability triggering the formation of clusters that move faster than the particles themselves. The many-body process relies on hydrodynamics alone and may prove useful for load delivery in fluidics.
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Tierno, P. A microscopic army. Nature Phys 13, 324–326 (2017). https://doi.org/10.1038/nphys3992
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DOI: https://doi.org/10.1038/nphys3992
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