Oscillatory driven colloidal binary mixtures: axial segregation versus laning

Abstract

Using Brownian dynamics computer simulations we show that binary mixtures of colloids driven in opposite directions by an oscillating external field exhibit axial segregation in sheets perpendicular to the drive direction. The segregation effect is stable only in a finite window of oscillation frequencies and driving strengths and is taken over by lane formation in direction of the driving field if the driving force is increased. In the crossover regime, bands tilted relative to the drive direction are observed. Possible experiments to verify the axial segregation are discussed.

5 pages, 4 figures, movies available at http://www2.thphy.uni-duesseldorf.de/~adam/

References in corpus (8)

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• Segregation and phase inversion of strongly and weakly fluctuated Brownian particle mixtures in spherical containers
• Stripe formation in horizontally oscillating granular suspensions
• Non-equilibrium dynamics of an active colloidal "chucker"
• Transport and selective chaining of bidisperse particles in a travelling wave potential
• Segregation pattern reorientation of granular mixture on horizontally oscillating tray
• Driving force for a nonequilibrium phase transition in three dimensional complex plasmas
• Microemulsions in the driven Widom-Rowlinson lattice gas
• Competition between lanes and transient jammed clusters in driven binary mixtures
• Macroscopic charge segregation in driven polyelectrolyte solutions
• Striped Patterns in Radially Driven Suspensions with Open Boundaries