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Updated: Oct 10, 2025

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Vesicle shape transformations driven by confined active filaments.

Matthew S E Peterson1, Aparna Baskaran2, Michael F Hagan3

  • 1Martin A. Fisher School of Physics, Brandeis University, Waltham, MA, 02453, United States.

Nature Communications
|December 14, 2021
PubMed
Summary
This summary is machine-generated.

Active matter systems with deformable boundaries create unique filament structures like rings and caps. These structures control vesicle shape and dynamics, offering design principles for new active materials.

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Area of Science:

  • Active matter physics
  • Soft condensed matter

Background:

  • Deformable boundaries in active matter systems organize internal active stresses.
  • Understanding minimal models is key to exploring complex active matter behaviors.

Purpose of the Study:

  • To investigate the behavior of polar active filaments within an elastic vesicle.
  • To explore the emergent filament organizations and vesicle dynamics.

Main Methods:

  • Particle-based simulations of an elastic vesicle with polar active filaments.
  • Analysis of interparticle interactions and confinement effects.

Main Results:

  • Observed novel filament organizations: highly-aligned rings and caps.
  • Demonstrated that filament assemblies drive vesicle shape transformations and dynamics.
  • Identified interplay between active stress and boundary deformability.

Conclusions:

  • Deformable confinement leads to unique active matter behaviors not seen in bulk or rigid systems.
  • Scaling models reveal mechanisms for emergent behaviors.
  • Provides design principles for engineering active materials with tunable shape dynamics.