Synchronized Rotations of Active Particles on Chemical Substrates
arXiv:2303.14489 · doi:10.1039/D3SM00452J
Abstract
Many microorganisms use chemical `signaling' - a quintessential self-organizing strategy in non-equilibrium - that can induce spontaneous aggregation and coordination in behavior. Using synthetic signaling as a design principle, we construct a minimal model of active Brownian particles (ABPs) having soft repulsive interactions on a chemically quenched patterned substrate. The interplay between chemo-phoretic interactions and activity is numerically investigated for a proposed variant of the Keller-Segel model for chemotaxis. Such competition not only results in a chemo-motility-induced phase-separated state but also a new cohesive clustering phase with synchronized rotations. Our results suggest that rotational order can emerge in systems by virtue of activity and repulsive interactions alone without an explicit alignment interaction. These rotations can also be exploited by designing mechanical devices that can generate reorienting torques using active particles.
8 pages, 9 figures
References in corpus (6)
- Novel type of phase transition in a system of self-driven particles
- Self-motile colloidal particles: from directed propulsion to random walk
- Enhanced diffusion and ordering of self-propelled rods
- Continuum Percolation Thresholds in Two Dimensions
- Active colloidal propulsion over a crystalline surface
- Emergent Synchronization and Flocking in Purely Repulsive Self-Navigating Particles