Fast-Moving Bacteria Self-Organize into Active Two-Dimensional Crystals of Rotating Cells
Condensed Matter journal club
Fast-Moving Bacteria Self-Organize into Active Two-Dimensional Crystals of Rotating Cells
- Event time: 11:30am
- Event date: 16th October 2015
- Speaker: Teun Vissers (Formerly School of Physics & Astronomy, University of Edinburgh)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Event details
Abstract
We investigate a new form of collective dynamics displayed by Thiovulum majus, one of the fastest swimming bacteria known. Cells spontaneously organize on a surface into a visually striking two dimensional hexagonal lattice of rotating cells. As each constituent cell rotates its flagella, it creates a tornadolike flow that pulls neighboring cells towards and around it. As cells rotate against their neighbors, they exert forces on one another, causing the crystal to rotate and cells to reorganize. We show how these dynamics arise from hydrodynamic and steric interactions between cells.We derive the equations of motion for a crystal, show that this model explains several aspects of the observed dynamics, and discuss the stability of these active crystals.PRL 114 article 158102 (2015)
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Authors
Alexander P. Petroff, Xiao-Lun Wu, Albert Libchaber
About Condensed Matter journal club
Given the diversity of research in the CM group, chosen topics vary widely. We tend to stick to high-impact journals - Nature, Science, PNAS and PRL have been popular - but this is not prescriptive..