2019/09/30 by Jens Grauer, Grauer, Jens, Hartmut Löwen +6
Engineering · Materials Science · Mathematics · Physics and Astronomy · #Biological system #Biology #Chemical physics #Chemotaxis #Cluster (spacecraft) #Cognitive science #Collective behavior #Computer science #Ecology #Evolutionary biology #FOS: Physical sciences #Materials science #Mathematical Biology Tumor Growth #Micro and Nano Robotics #Molecular Communication and Nanonetworks #Nanotechnology #Physics #Pickering emulsions and particle stabilization #Receptor #Self organisation #Slime Mold and Myxomycetes Research #Soft Condensed Matter (cond-mat.soft) #Swarm behaviour #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.1909.13805
published in arXiv (Cornell University) (Cornell University) · movies temporarily available at: https://www.dropbox.com/sh/9zokvqwfpbd48z7/AABxvMEBHFJGkbaKvk0gc0x_a?dl=0
arxiv created 2019/09/30 · openalex publication_date 2019/09/30 · arxiv updated 2019/10/01 · openalex created_date 2022/07/28 · openalex updated_date 2026/08/06
A large variety of microorganisms produce molecules to communicate via\ncomplex signaling mechanisms such as quorum sensing and chemotaxis. The\nbiological diversity is enormous, but synthetic inanimate colloidal\nmicroswimmers mimic microbiological communication (synthetic chemotaxis) and\nmay be used to explore collective behaviour beyond the one-species limit in\nsimpler setups. In this work we combine particle based and continuum\nsimulations as well as linear stability analyses, and study a physical minimal\nmodel of two chemotactic species. We observed a rich phase diagram comprising a\n"hunting swarm phase", where both species self-segregate and form swarms,\npursuing, or hunting each other, and a "core-shell-cluster phase", where one\nspecies forms a dense cluster, which is surrounded by a (fluctuating) corona of\nparticles from the other species. Once formed, these clusters can dynamically\nturn inside out, representing a "species-reversal". These results exemplify a\nphysical route to collective behaviours in microorganisms and active colloids,\nwhich are so-far known to occur only for comparatively large and complex\nanimals like insects or crustaceans.\n