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Lane reduction in driven 2d-colloidal systems through microchannels | | M. Köppl
; P. Henseler
; A. Erbe
; P. Nielaba
; P. Leiderer
; | | Date: |
14 Jun 2006 | | Subject: | Soft Condensed Matter | | Abstract: | The transport behavior of a system of gravitationally driven colloidal particles is investigated. The particle interactions are determined by the superparamagnetic behavior of the particles. They can thus be arranged in a crystalline order by application of an external magnetic field. Therefore the motion of the particles through a narrow channel occurs in well-defined lanes. The arrangement of the particles is perturbed by diffusion and the motion induced by gravity. Due to these combined influences a density gradient forms along the direction of motion of the particles. A reconfiguration of the crystal is observed leading to a reduction of the number of lanes. In the course of the lane reduction transition a local melting of the quasi-crystalline phase to a disordered phase and a subsequent crystallization along the motion of the particles is observed. This transition is characterized experimentally and using Brownian dynamics (BD) simulations. | | Source: | arXiv, cond-mat/0606352 | | Services: | Forum | Review | PDF | Favorites | |
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