Nichtlinearer Ionentransport in glasbildenden ionischen Flössigkeiten: Messung höherer harmonischer Ströme und elektrische Kriechexperimente

• Antragsteller: Professor Dr. Bernhard Roling
• Fachliche Zuordnung: Statistische Physik, Nichtlineare Dynamik, Komplexe Systeme, Weiche und fluide Materie, Biologische Physik
• Förderung: Förderung von 2010 bis 2014
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 157463299

The nonlinear ionic conductivity of supercooled ionic liquids and of their mixtures with molecular liquids shall be studied by measuring higher-harmonic currents after applying high ac electric fields. In order to generate fields above 100 kV/cm, different electrode configurations will be set up and tested. In mixtures with small amounts of ionic liquid, the nonlinear dynamics of quasi-independent ions will be probed. With increasing ion concentration, interactions between the probe ions will become more and more relevant. A detailed comparison will be drawn between our experimental results and the theoretical results obtained in other projects. In particular, theoretical predictions about the shrinkage of the linear response regime close to the glass transitions will be tested. The aim is to gain new insights into the force-dependent subdiffusive and diffusive ion dynamics during vitrification.

• DFG-Verfahren: Forschungsgruppen
• Teilprojekt zu: FOR 1394: Nonlinear response to probe vitrification