Department of Mathematical Sciences Seminar
Wednesday, September 26 in RI 222 at 3:30pm.
Speaker: Daisuke Takagi, Courant Institute of Mathematical Sciences, Applied Math Lab, NYU
Title: How synthetic microswimmers move, turn, flip, and spread
Abstract: Microscopic swimmers are envisioned to perform medical and technological tasks. To study their motion and dispersion, we work with a model system of bimetallic rods that are propelled chemically. These rods move autonomously in large circles and curiously flip over on a surface. By accounting for fluctuation-driven flipping of slightly curved rods, we obtain analytical solutions for their ensemble behavior in good agreement with our experiments. This shows that minor shape imperfections can yield major effects on macroscopic dispersion. Our model can be used to predict the long-term behavior of synthetic microswimmers as well as motile microbes in various environments.