| Abstract
| - This paper describes dynamic self-assembly of millimeter-sized, magnetized disks floating at two parallelinterfaces and spinning under the influence of a rotating, external magnetic field. All disks experience acentral, confining magnetic potential, and interact with one another hydrodynamically both in the plane ofthe interface, and between the interfaces. The interactions between the disks spinning on different interfacesare repulsive for low rotational speeds, and attractive for high rotational speeds. The interplay between magneticand hydrodynamic forces acting in the system leads to the formation of quasi three-dimensional, orderedaggregates. Changing the rotation speeds of the disks can reversibly change the morphologies of theseaggregates.
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