Water-induced changes in the charge-transport dynamics of titanate nanowires.
The temperature dependence of dielectric processes in humid titanate nanowires was investigated via broadband dielectric spectroscopy under quasi-isosteric conditions in the temperature range of 150-350 K. It was found that the dynamic parameters obtained from low-temperature measurements cannot describe the dielectric behavior of the system above 273 K, implying changes in the dynamics of the corresponding dielectric processes. The calculated activation energies and pre-exponential factors counterintuitively increase linearly with the amount of adsorbed water, and a compensation effect was also found to apply to all contributions in the TiONW spectra.
Department of Applied and Environmental Chemistry, University of Szeged , Rerrich Béla tér 1, H-6720 Szeged, Hungary.
Henrik
H
Haspel
Valéria
V
Bugris
Ákos
Á
Kukovecz