Berlin 2018 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 63: Transport (Diffusion, conductivity, heat)

MM 63.3: Vortrag

Donnerstag, 15. März 2018, 16:15–16:30, TC 010

Plasma charge carrier attachment induced transport in electrolytes — •Jan Wiemer and Karl-Michael Weitzel — Philipps Universität Marburg, Chemistry Department

A new approach for measuring the electrical conductivity properties of solid electrolytes over a wide range of total pressures applicable for any thickness of the sample is presented. The approach is based on generating a plasma by femtosecond laser ionization of e.g. air. Charge carriers of different polarity are separated in a static electric field. Charge carriers of the selected polarity are attached to the front side of a sample which is in contact with a single metal electrode inducing a well defined surface potential. This induces charge carrier transport in the sample which is detected at the metal electrode. We present different examples of glasses demonstrating that the approach allows measuring conductivities and activation energies in full agreement with reference measurements. The advantages are that the sample is i.) only in contact with a single electrode, ii.) the pressure range is from fine vacuum up to high pressures, iii.) the chemical identity of the charge carrier can be chosen by choosing the plasma medium and iv.) the polarity can be easily switched by switching static fields.