Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 10: Poster: Charged Soft Matter

CPP 10.5: Poster

Montag, 14. März 2011, 17:30–19:30, P2

Dielectric Spectroscopy of Charged Soft Matter — •Pedro Armando Ojeda May, Marcello Sega, Sofia Kantorovich, Axel Arnold, and Christian Holm — Institute for Computational Physics, Pfaffenwaldring 27, 70569 Stuttgart

We present the results of MD simulations for systems of extended dipoles in presence of charged species. Static and frequency-dependent dielectric permittivities are computed employing charge structure factors, showing how it is possible to isolate the different contributions to the permittivity, namely that of dipoles, of free charges, and the cross contributions.

The results from the simulations are used to shed light on the applicability of theoretical approaches such as those of Caillol [JCP 91 5544 (1989)] and Schroeder [JCP 126, 084511 (2007)] for the calculation of dielectric spectra of ionic liquids.