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Controlling Flow Speeds of Microtubule-Based 3D Active Fluids Using Temperature
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Collective Motion and Pattern Formation in Phase-Synchronizing Active Fluids.

Brato Chakrabarti1, Michael J Shelley1,2, Sebastian Fürthauer1,3

  • 1Center for Computational Biology, Flatiron Institute, New York, New York 10010, USA.

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|April 7, 2023
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Summary
This summary is machine-generated.

Active particles in suspension synchronize and form distinct collective motion patterns. These findings reveal new routes for collective motion and pattern formation in active matter, guiding the design of novel active materials.

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Area of Science:

  • Physics
  • Soft Matter Physics
  • Non-equilibrium Systems

Background:

  • Active particles, like micro-organisms and motor proteins, perform work through periodic shape changes.
  • Interactions between these particles can lead to the synchronization of their activity cycles.

Purpose of the Study:

  • To investigate the collective dynamics of hydrodynamically coupled active particles.
  • To understand emergent nonequilibrium states and pattern formation in active matter systems.

Main Methods:

  • Studying suspensions of active particles coupled via hydrodynamic interactions.
  • Analyzing the system's behavior at varying particle densities.
  • Investigating the effects of confinement and boundary conditions.

Main Results:

  • At high densities, the system exhibits a novel transition to collective motion, distinct from other active matter instabilities.
  • Emergent nonequilibrium states display stationary chimera patterns, co-localizing synchronized and phase-isotropic regions.
  • Confinement leads to oscillatory flows and robust unidirectional pumping states, controllable by alignment boundary conditions.

Conclusions:

  • Identified a new mechanism for collective motion and pattern formation in active matter.
  • Demonstrated the existence of controllable chimera patterns and pumping states in confined active particle systems.
  • Results offer insights for designing advanced active materials with tailored collective behaviors.