CO$_2$-driven diffusiophoresis for removal of bacteria
Soft Condensed Matter
2020-09-16 v1 Fluid Dynamics
Abstract
We investigate CO-driven diffusiophoresis of colloidal particles and bacterial cells in a Hele-Shaw geometry. Combining experiments and a model, we understand the characteristic length and time scales of CO-driven diffusiophoresis in relation to system dimensions and CO diffusivity. Directional migration of wild-type V. cholerae and a mutant lacking flagella, as well as S. aureus and P. aeruginosa, near a dissolving CO source shows that diffusiophoresis of bacteria is achieved independent of cell shape and Gram stain. Long-time experiments suggest possible applications for bacterial diffusiophoresis to cleaning systems or anti-biofouling surfaces.
Cite
@article{arxiv.2009.07081,
title = {CO$_2$-driven diffusiophoresis for removal of bacteria},
author = {Suin Shim and Sepideh Khodaparast and Ching-Yao Lai and Jing Yan and Jesse T. Ault and Bhargav Rallabandi and Orest Shardt and Howard A. Stone},
journal= {arXiv preprint arXiv:2009.07081},
year = {2020}
}