Static and Dynamic Self?Assembly of Pearl?Like?Chains of Magnetic Colloids Confined at Fluid Interfaces

Magnetic colloids adsorbed at a fluid interface are unique model systems to understand self-assembly in confined environments, both equilibrium and out of equilibrium, with important potential applications. In this work the pearl-chain-like self-assembled structures superparamagnetic fluid–fluid under static time-dependent actuations investigated. On one hand, it is found that generated by fields transform as tilt angle field increased, from 2D crystals separated pearl-chains process occurs through controllable reversible zip-like thermally activated mechanism. other actuation precessing about axis perpendicular induces dynamic no counterpart non-confined systems, interplay averaged magnetic interactions, interfacial forces, hydrodynamics. Finally, how these can be used remotely roller conveyors, able transport passive colloidal cargos interfaces generate parallel viscous flows shown. The latter mixture molecules acceleration surface-chemical reactions, overcoming diffusion limitations.