Salt-induced counterion-mobility anomaly in polyelectrolyte electrophoresis.

  title={Salt-induced counterion-mobility anomaly in polyelectrolyte electrophoresis.},
  author={Sebastian Fischer and Ali Naji and Roland R Netz},
  journal={Physical review letters},
  volume={101 17},
We study the electrokinetics of a single polyelectrolyte chain in salt solution using hydrodynamic simulations. The salt-dependent chain mobility compares well with experimental DNA data. The mobility of condensed counterions exhibits a salt-dependent change of sign, an anomaly that is also reflected in the counterion excess conductivity. Using Green's… CONTINUE READING