VersaSCAN-LEIS Localized Electrochemical Impedance Spectroscopy
The VersaSTAT 3F applies an AC voltage to the sample emerged in electrolyte. This “global” voltage generates AC current to flow at the electrode / electrolyte interface. A dual-element probe is positioned in solution close to the surface of the sample. The electrometer measures a differential voltage measure between the two measurement elements as a measure of local voltage-drop in solution. This voltage-drop exists in solution because of current flow from local reactions at the sample, the resistance of the electrolyte and the spatial separation of the dual measurement elements.
The VersaSCAN’s electrometer inputs its measured voltage to the auxiliary differential voltage input available with the VersaSTAT 3F.
Software integration converts the measured local voltage-drop at the probe to local AC current.
The ratio of local measured current to the global applied voltage gives the localized impedance magnitude and phase shift.
- Control voltage of a sample and use a dual-element probe to measure local current, leading to calculated local impedance
- Sweep frequency at fixed position or Map area at fixed frequency
- LEIS provides spatial resolution to all the applications that benefit from EIS measurements
- Wide measurement bandwidth and high measurement accuracy combine to benefit local State-of-Charge (SoC) measurements and Coatings failure analysis
