title: Magnetically driven surface mixing.
abstract: Magnetic microparticles suspended on the surface of liquid and energized by vertical alternating magnetic field exhibit complex collective behavior. Various immobile and self-propelled self-assembled structures have been observed. Here, we report on experimental studies of mixing and surface diffusion processes in this system. We show that the pattern-induced surface flows have properties of quasi-two-dimensional turbulence. Correspondingly, the surface advection of tracer particle exhibits properties of Brownian diffusion.
authors: Materials Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA.
authors: M
authors: M
authors: Belkin
authors: A
authors: A
authors: Snezhko
authors: I S
authors: IS
authors: Aranson
authors: W-K
authors: WK
authors: Kwok