Geometry-driven collective ordering of bacterial vortices
arXiv:1705.02136 · doi:10.1039/c7sm00999b
Abstract
Controlling the phases of matter is a challenge that spans from condensed materials to biological systems. Here, by imposing a geometric boundary condition, we study controlled collective motion of Escherichia coli bacteria. A circular microwell isolates a rectified vortex from disordered vortices masked in bulk. For a doublet of microwells, two vortices emerge but their spinning directions show transition from parallel to anti-parallel. A Vicsek-like model for confined self-propelled particles gives the point where two spinning patterns occur in equal probability and one geometric quantity governs the transition as seen in experiments. This mechanism shapes rich patterns including chiral configurations in a quadruplet of microwells, thus revealing a design principle of active vortices.
arXiv comment5 pages, 5 figures. Supplemental materials: 3 pages
References in corpus (18)
- Novel type of phase transition in a system of self-driven particles
- Skyrmion Lattice in a Chiral Magnet
- The Mechanics and Statistics of Active Matter
- Spontaneous motion in hierarchically assembled active matter
- Meso-scale turbulence in living fluids
- Collective Motion of Vibrated Polar Disks
- Confinement Stabilizes a Bacterial Suspension into a Spiral Vortex
- Fluid Flows Created by Swimming Bacteria Drive Self-Organization in Confined Suspensions
- Topographical pathways guide chemical microswimmers
- Emergent vortices in populations of colloidal rollers
- Type-1.5 Superconductors
- Ferromagnetic and antiferromagnetic order in bacterial vortex lattices
- Stabilization of active matter by flow-vortex lattices and defect ordering
- Long-range nematic order and anomalous fluctuations in suspensions of swimming filamentous bacteria
- A mean-field theory for self-propelled particles interacting by velocity alignment mechanisms
- Collective Motion of Self-Propelled Particles with Memory
- Spontaneous Patterning of Confined Granular Rods
- Giant adsorption of microswimmers: duality of shape asymmetry and wall curvature
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- Chiral Active Particles are Sensitive Reporter to Environmental Geometry
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- Controlling topological defects and contractile flow in confined nematic cell population
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- Quasi-two-dimensional bacterial swimming around pillars: enhanced trapping efficiency and curvature dependence
- Giant vortex dynamics in confined active turbulence
- Tailoring collective motion of kinesin-driven microtubules via topographic landscapes
- Helical Flow States in Active Nematics
- Polar order, shear banding, and clustering in confined active matter
- Confinement-driven state transition and bistability in schooling fish
- Lane formation and critical coarsening in a model of bacterial competition
- Collective dynamics of active dumbbells near a circular obstacle
- Flocking turbulence of microswimmers in confined domains
- Deep Learning-based Detection of Bacterial Swarm Motion Using a Single Image
- Oscillating edge current in polar active fluid
- Collective dynamics of densely confined active polar disks with self- and mutual alignment
- Geometric frustration and pairing order transition in confined bacterial vortices
- Topological fine structure of smectic grain boundaries and tetratic disclination lines within three-dimensional smectic liquid crystals
- Cellcell and Cellnoise Interactions of Bacterial Cells in a Shallow Circular Pool and Transitions of Collective Motions
- Stable and unstable flow regimes for active fluids in the periodic setting