期刊
NATURE COMMUNICATIONS
卷 6, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncomms8470
关键词
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资金
- ANR program MiTra
- Institut Universitaire de France
- Donors of the American Chemical Society Petroleum Research Fund
- NSF CAREER Grant [CBET-1151590]
- JSPS Core-to-Core Program 'Non-equilibrium dynamics of soft matter and information'
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1532652] Funding Source: National Science Foundation
Coherent vortical motion has been reported in a wide variety of populations including living organisms (bacteria, fishes, human crowds) and synthetic active matter (shaken grains, mixtures of biopolymers), yet a unified description of the formation and structure of this pattern remains lacking. Here we report the self-organization of motile colloids into a macroscopic steadily rotating vortex. Combining physical experiments and numerical simulations, we elucidate this collective behaviour. We demonstrate that the emergent-vortex structure lives on the verge of a phase separation, and single out the very constituents responsible for this state of polar active matter. Building on this observation, we establish a continuum theory and lay out a strong foundation for the description of vortical collective motion in a broad class of motile populations constrained by geometrical boundaries.
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