Polyelectrolyte Electrophoresis in Nanochannels: A Dissipative Particle Dynamics Simulation - Condensed Matter > Soft Condensed MatterReport as inadecuate




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Abstract: We present mesoscopic DPD-simulations of polyelectrolyte electrophoresis inconfined nanogeometries, for varying salt concentration and surface slipconditions. Special attention is given to the influence of electroosmotic flowEOF on the migration of the polyelectrolyte. The effective polyelectrolytemobility is found to depend strongly on the boundary properties, i.e., the sliplength and the width of the electric double layer. Analytic expressions for theelectroosmotic mobility and the total mobility are derived which are in goodagreement with the numerical results. The relevant quantity characterizing theeffect of slippage is found to be the dimensionless quantity $\kappa \:\delta B$, where $\delta B$ is the slip length, and $\kappa^{-1}$ an effectiveelectrostatic screening length at the channel boundaries.



Author: Jens Smiatek, Friederike Schmid

Source: https://arxiv.org/







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