Determination of Contact Potential Difference by the Kelvin Probe (Part II) 2. Measurement System by Involving the Composite Bucking Voltage

Abstract

The present research is devoted to creation of a new low-cost miniaturised measurement system for determination of potential difference in real time and with high measurement resolution. Furthermore, using the electrode of the reference probe, Kelvin method leads to both an indirect measurement of electronic work function or contact potential of the sample and measurement of a surface potential for insulator type samples. The bucking voltage in this system is composite and comprises a periodically variable component. The necessary steps for development of signal processing and tracking are described in detail.

Prevention of Electrostatic Charge Generation in Filtration of Low-Conductivity Oils by Surface Modification of Modern Filter Media

“…The respective contact potentials and thus the electron work functions U M of select raw and treated substrates were determined on an amplitude-modulated (AM) KPFM, where the contact potential difference V CPD was determined (Volta and Banks (21); Vilitis, et al (22,23)). In addition, the electrical potential distributions of sample surfaces were mapped as described in the literature (Rezende, et…”