Activity induced collapse and re-expansion of rigid polymers

Abstract

We study the elastic properties of a rigid filament in a bath of self-propelled particles. We find that while fully flexible filaments swell monotonically upon increasing the strength of the propelling force, rigid filaments soften for moderate activities, collapse into metastable hairpins for intermediate strengths, and eventually re-expand when the strength of the activity of the surrounding fluid is large. This collapse and re-expansion of the filament with the bath activity is reminiscent of the behavior observed in polyelectrolytes in the presence of different concentrations of multivalent salt.

10 pages, 4 figures

References in corpus (7)

• Sedimentation, trapping, and rectification of dilute bacteria
• Self-Starting Micromotors in a Bacterial Bath
• Rectification of Swimming Bacteria and Self Driven Particle Systems by Arrays of Asymmetric Barriers
• Salt-induced collapse and reexpansion of highly charged flexible polyelectrolytes
• Transport powered by bacterial turbulence
• Unusual swelling of a polymer in a bacterial bath
• Curvature Induced Activation of a Passive Tracer in an Active Bath

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