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DY: Fachverband Dynamik und Statistische Physik
DY 15: Active Matter II (joint session BP/CPP/DY)
DY 15.7: Talk
Tuesday, March 19, 2024, 11:15–11:30, H 1028
Structural Colour from Collective Gliding Bacteria Motion — •Junwei Wang1, Marina Portoghese2, Laura Caton2, Colin Ingham3, and Silvia Vignolini1 — 1Max Planck Institute of Colloids and Interfaces, Potsdam, Germany — 2University of Cambridge, Cambridge, UK — 3Hoekmine BV, Utrecht, Netherland
We report a type of marine, non-pathogenic, gliding bacteria, Flavobacterium Iridescent 1 (IR1), that grows into a dense active liquid crystal colony, exhibiting structural colour. We demonstrate different crystalline phases arising from collective bacteria motility correlate with varied optical appearances of the colony. We show the hierarchical collective motions of the rod-like bacteria that organize into clusters, monolayer, multi-layers and finally into large scale vortices. We also illustrate how the bacteria colony adapts to confinement of different geometries.
Keywords: active nematics; bacteria biophysics; structural color; nanostructure; emergent