Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session B29: Active Matter in Complex Environments II
11:15 AM–2:03 PM,
Monday, March 2, 2020
Sponsoring Units: DSOFT DBIO GSNP DFD
Chair: Tapomoy Bhattacharjee, Princeton University
Abstract: B29.00006 : Slip and distance effects on the self-propulsion of catalytic microswimmers close to a wall
Joost de Graaf
Rachel Pamela Doherty
Daniela Jutta Kraft
In this talk, we will present quantitative measurements of the effect of the substrate on the velocity of Pt-coated model microswimmers. We will show that under otherwise fixed conditions the velocity depends on the substrate wetting angle, which in turn relates to the associated hydrodynamic slip length of the substrate. We will further demonstrate that our hypothesis on slip dependent velocities is not only supported by qualitative and scaling arguments, but also by our measurements on swimmer-wall separation distance.
Our findings provide further understanding on the swimming behavior of synthetic microswimmers. Such understanding is desirable for future applications that may require microscopic devices to self-propel in liquid environments in confinement and along boundaries.
The American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics.
1 Physics Ellipse, College Park, MD 20740-3844
Editorial Office 1 Research Road, Ridge, NY 11961-2701 (631) 591-4000
Office of Public Affairs 529 14th St NW, Suite 1050, Washington, D.C. 20045-2001 (202) 662-8700