Volume 143, Number 6, September 2023
|Number of page(s)
|Biological and soft matter physics
|10 October 2023
Design principles for transporting vesicles with enclosed active particles(a)
Martin Fisher School of Physics, Brandeis University - 415 South Street, Waltham, MA 02453, USA
Received: 27 March 2023
Accepted: 18 September 2023
We use coarse-grained molecular-dynamics simulations to study the motility of a 2D vesicle containing self-propelled rods, as a function of the vesicle bending rigidity and the number density, length, and activity of the enclosed rods. Above a threshold value of the rod length, distinct dynamical regimes emerge, including a dramatic enhancement of vesicle motility characterized by a highly persistent random walk. These regimes are determined by clustering of the rods within the vesicle; the maximum motility state arises when there is one long-lived polar cluster. We develop a scaling theory that predicts the dynamical regimes as a function of control parameters, and shows that feedback between activity and passive membrane forces govern the rod organization. These findings yield design principles for building self-propelled superstructures using independent active agents under deformable confinement.
© 2023 EPLA
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