Dresden 2011 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 10: Poster: Charged Soft Matter

CPP 10.6: Poster

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

Charge transport in confined ionic liquids — •Ciprian Iacob¹, Joshua Sangoro¹, Rustem Valiullin¹, Roger Gläser², Jörg Kärger¹, and Friedrich Kremer¹ — ¹Institute of Experimental Physics I,University of Leipzig, Leipzig, Germany. — ²Institute of Chemical Technology ,University of Leipzig, Leipzig, Germany.

Broadband Dielectric Spectroscopy is employed to study charge transport in ionic liquids (ILs) in silica nanoporous membranes [1-3]. The dielectric spectra are interpreted in terms of hopping of charge carriers over spatially randomly varying energy barriers. By applying the Einstein-Smoluchowski relation to the dielectric spectra, diffusion coefficients are obtained. At higher temperatures, the diffusion coefficients of the confined and bulk ionic liquids are identical for all pore sizes while ILs are observed to diffuse faster in comparison to their bulk value at lower temperatures. The results are discussed with respect to the interplay between the dynamic glass transition and charge transport in ILs.

References:

[1] C. Iacob, J.R. Sangoro, A. Serghei, S. Naumov, Y. Korth, J. Kärger, C. Friedrich and F. Kremer. J.Chem.Phys. 129, 234511 (2008).

[2] J.R. Sangoro, C. Iacob, A. Serghei, C. Friedrich and F. Kremer. Phys. Chem. Chem. Phys. 11, 913-916 (2009).

[3] C. Iacob, J.R. Sangoro, P. Papadopoulos, R. Valiullin, S. Naumov, J. Kärger and F. Kremer Phys. Chem. Chem. Phys., 12, 13798-13803 (2010).