We study the formation of bands of colloidal particles driven by periodic external fields. Using Brownian dynamics, we determine the dependence of the band width on the strength of the particle interactions and on the intensity and periodicity of the field. We also investigate the switching (field-on) dynamics and the relaxation times as a function of the system parameters. The observed scaling relations were analyzed using a simple dynamic density-functional theory of fluids. (C) 2016 AIP Publishing LLC.
机构:
Brandeis Univ, Martin Fisher Sch Phys, Waltham, MA 02454 USA
Harvard Univ, Rowland Inst, Cambridge, MA 02143 USABrandeis Univ, Martin Fisher Sch Phys, Waltham, MA 02454 USA
Barry, Edward
Dogic, Zvonimir
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机构:
Brandeis Univ, Martin Fisher Sch Phys, Waltham, MA 02454 USA
Harvard Univ, Rowland Inst, Cambridge, MA 02143 USABrandeis Univ, Martin Fisher Sch Phys, Waltham, MA 02454 USA