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Self-Assembly of Microtubule Tactoids
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From dynamic self-organization to avalanching instabilities in soft-granular threads.

J Guzowski1, R J Buda1, M Costantini1

  • 1Institute of Physical Chemistry, Polish Academy of Sciences, ul. Kasprzaka 44/52, 01-224 Warsaw, Poland. jguzowski@ichf.edu.pl.

Soft Matter
|February 15, 2022
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Summary
This summary is machine-generated.

Soft granular matter, like droplet chains, self-assembles via adaptive rearrangements. These fluid dynamics offer insights into wet granular materials and potential applications in tissue engineering and materials science.

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Area of Science:

  • Soft matter physics
  • Fluid dynamics
  • Granular materials science

Background:

  • Investigates wet soft-granular matter, a system of soft, fluid-wetted grains like droplet chains, hydrogels, and foams.
  • Contrasts with rigid granular matter, highlighting how grain deformability enables more metastable states and self-assembly.
  • Motivated by the need to understand complex dynamics in soft, interconnected granular systems.

Purpose of the Study:

  • To explore the dynamics of droplet chains and multi-chains interconnected by capillary bridges.
  • To investigate the self-assembly and reorganization of soft granular matter under external drive.
  • To identify and analyze fluidization-induced instabilities in these systems.

Main Methods:

  • Utilized a co-flow configuration to generate various low-dimensional granular patterns (chains, multi-chains, folds).
  • Observed droplet chain dynamics, including limit cycle rearrangements and spontaneous fluidization.
  • Analyzed fluidization-induced instabilities by examining the competition between advection and propagation.

Main Results:

  • Generated diverse granular patterns from linear chains to complex multi-chains and segmented structures.
  • Observed self-organization in folded chains through adaptive limit cycle rearrangements.
  • Documented spontaneous fluidization and avalanches of rearrangements upon weakening capillary forces, identifying two instability types.

Conclusions:

  • Demonstrated adaptive self-assembly mechanisms in soft granular systems, applicable to foams and microgels.
  • Reported quasi-1D compartmentalized structures have potential applications in tissue engineering, bioprinting, and materials science.
  • Provided fundamental insights into the physics of wet soft-granular matter and its dynamic behaviors.