Regensburg 2013 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 47: Charged Soft Matter

CPP 47.7: Vortrag

Freitag, 15. März 2013, 11:15–11:30, H34

Impedance spectroscopy of ions at liquid-liquid interfaces — •Andreas Reindl, Markus Bier, and S. Dietrich — Max Planck Institute IS, Stuttgart, Germany, and University of Stuttgart, Germany

We consider theoretically the dynamics of the ions in electrolytic cells with liquid-liquid interfaces by using dynamic density functional theory. This approach leads to a generalized Nernst-Planck equation the solutions of which are used to determine the experimentally accessible quantities impedance and dielectricity. We could find alternative circuits consisting only of the classic components ohmic resistance and capacitance which approximate the calculated spectra very well. Supported by the circuits, statements about the ion dynamics at the interface are possible for all frequencies.