Salt-Induced Counterion-Mobility Anomaly in Polyelectrolyte Electrophoresis - Condensed Matter > Soft Condensed MatterReport as inadecuate




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Abstract: We study the electrokinetics of a single polyelectrolyte chain in saltsolution using hydrodynamic simulations. The salt-dependent chain mobilitycompares well with experimental DNA data. The mobility of condensed counterionsexhibits a salt-dependent change of sign, an anomaly that is also reflected inthe counterion excess conductivity. Using Green-s function techniques thisanomaly is explained by electrostatic screening of the hydrodynamicinteractions between chain and counterions.



Author: Sebastian Fischer, Ali Naji, Roland R. Netz

Source: https://arxiv.org/







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