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Title: Spontaneous polarization and locomotion of an active particle with surface-mobile enzymes
Author: De Corato, Marco
Pagonabarraga Mora, Ignacio
Abdelmohsen, Loai K. E. A.
Sánchez, Samuel
Arroyo, Marino
Keywords: Locomoció
Cèl·lules eucariotes
Eukaryotic cells
Issue Date: 7-Dec-2020
Publisher: American Physical Society
Abstract: We examine a mechanism of locomotion of active particles whose surface is uniformly coated with mobile enzymes. The enzymes catalyze a reaction that drives phoretic flows but their homogeneous distribution forbids locomotion by symmetry. We find that the ability of the enzymes to migrate over the surface combined with self-phoresis can lead to a spontaneous symmetry-breaking instability whereby the homogeneous distribution of enzymes polarizes and the particle propels. The instability is driven by the advection of enzymes by the phoretic flows and occurs above a critical Péclet number. The transition to polarized motile states occurs via a supercritical or subcritical pitchfork bifurcations, the latter of which enables hysteresis and coexistence of uniform and polarized states.
Note: Reproducció del document publicat a:
It is part of: Physical Review Fluids, 2020, vol. 5, p. 122001(R)
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ISSN: 2469-990X
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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