Oscillatory driven colloidal binary mixtures: axial segregation versus laning

Details Oscillatory driven colloidal binary mixtures: axial segregation versus laning Oscillatory driven colloidal binary mixtures: axial segregation versus laning

2008-12-23

arxiv.org/abs/0812.4377v1

Physics

Condensed Matter

Soft Condensed Matter

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

Scientific paper

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.

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