Alternating current measurements in biology are concerned with the resistance and capacitance of the cell membrane, and the resistance of the cell interior. No systematic electrical measurements have so far been made on the cell nucleus. Such expressions as resistance, capacitance and impedance are generally associated with wireless sets or wireless components. They have, however, a physico-che...

An experimental setup has been developed for successive photo-electrochemical etch and EIS measurement of semiconductor samples. Furthermore an algorithm based on electrochemical capacitance-voltage (ECV) has been developed for calculating dopant profile based on the measurements by developed setup. Phosphorous diffusion profile in p-type silicon was estimated by employing developed setup and a...

For developing and testing of power electronic converters and circuits, voltages and currents have to be measured to verify the proper mode of operation. In cascaded converters or multi-level topologies, the voltages to be measured contain common mode components up to several kV with transients up to several tens of kV/μs. Conventional isolated voltage measurement systems do either not meet the...

A graphene Schottky contact was fabricated on an AlGaN/GaN heterostructure and subsequently analyzed. The calculated experimentally measured barrier heights (SBHs) determined using the theoretical Schottky–Mott model, thermionic emission temperature-dependent current–voltage measurement, capacitance–voltage measurement were observed to be inconsistent, which attributed ambiguities in both area ...

Vascular integrity is important in maintaining homeostasis of brain microenvironments. In various brain diseases including Alzheimer's disease, stroke, and multiple sclerosis, increased paracellular permeability due to breakdown of blood-brain barrier is linked with initiation and progression of pathological conditions. We developed a capacitance sensor array to monitor dielectric responses of ...

We characterized the influence of conductance changes on whole-cell patch clamp capacitance measurements with a lock-in amplifier and the limitations of the phase-tracking method by numerical computer simulations, error formulas, and experimental tests. At correct phase setting, the artifacts in the capacitance measurement due to activation of linear conductances are small. The cross talk into ...