Electricity: measuring and testing – Electrostatic field
Patent
1991-01-18
1992-08-04
Harvey, Jack B.
Electricity: measuring and testing
Electrostatic field
324458, 324453, G01R 2912
Patent
active
051362473
ABSTRACT:
A method of making a calibrated measurement of the contact potential difference between a probe electrode and the surface of a sample surface involves the use of a reference standard. The reference standard comprises an electrolyte solution in electrical contact with an electrochemical half-cell; the surface of the electrolyte constitutes the reference surface whose CPD can be measured. The method is intended for use with apparatuses such as a vibrating capacitor or Kelvin probe, and allows the absolute work function of a sample surface to be determined from measurements obtained in a gas atmosphere. An apparatus incorporating the reference standard, and an improved vibrating capacitor probe, are also disclosed.
REFERENCES:
patent: 4463316 (1984-07-01), Messens et al.
Hansen, G., "Theory and Ex Situ Studies of the Electrochemical Double Layer," Ph D. Thesis, Utah State University, Logan, Utah, 1986/Dec. pp. 69-112; 122-151; 198-201.
Hansen, W. N. and Hansen, G. J., "Absolute Half-Cell Potential: A Simple Direct Measurement," Physical Review A 36:1396-1402, 1987/Aug.
Hansen, W. N. and Hansen, G. J., "Implication of Double-Layer Emersion," ACS Symposium Series 378, Electrochemical Surface Science, M. Soriage, Ed., American Chemical Society, Washington, D.C., 1988/Dec.
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