Results 261 to 270 of about 14,225,696 (298)
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An improved technique for the measurement of contact potential differences
Journal of Scientific Instruments, 1957A development of the vibrating-capacitor method is described. It is used for the measurement of contact potential-differences between a standard electrode and an area of about 1 square millimetre of a metal surface immersed in an insulating liquid. Discrimination against circuit noise is achieved by homodyne rectification. A novel form of drive for the
K A Macfadyen, T A Holbeche
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The contact potential difference between tungsten and niobium
British Journal of Applied Physics, 1964Contact potential difference measurements have been made between tungsten and niobium foil using both the Kelvin and the displacement of the retarding potential line techniques in ultra-high vacuum conditions. Values of 0.18 ± 0.04 and 0.17 ± 0.03 v were obtained respectively leading to a mean work function for niobium of 4.37 ± 0.03 ev.
B J Hopkins, K J Ross
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Bernoulli effect and contact potential difference in superconductors
Soviet Journal of Low Temperature Physics, 1983An expression is derived for the Bernoulli potential that arises in superconductors with an inhomogeneous current distribution. The expression is valid for arbitrary temperatures and superfluid velocities. In the superconductor–dielectric–superconductor system we consider the Bernoulli effect, which manifests itself in a contact potential difference ...
A. N. Omel'yanchuk, S. I. Beloborod'ko
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A novel, micro-contact potential difference probe
Sensors and Actuators B: Chemical, 2003Abstract A novel, non-vibrating, micro-contact potential difference (CPD) probe fabricated by micromachining has been tested for measurements on a magnetic hard disk drive. The 50 μm diameter probe, with integrated shielding, provides high-resolution surface images as the probe is scanned over the surface of interest. The probe utilizes Parylene as a
Matthew Moorman +3 more
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Ionization Method of Measuring Contact Potential Differences
Review of Scientific Instruments, 1964A modification of the ionization method of measuring the contact potential difference between two surfaces is described which permits remote separation between the source electrodes and the indicating meter. Elapsed time recording is easily accomplished. The errors resulting from large separation between the electrodes are analyzed.
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Biophysik, 1973
<p>The contact potential difference is presented in relation to the electrokinetic potential and the surface potentials of the cells. © 1973 Springer-Verlag.</p>
Minc, S., Krzysztof Dołowy
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<p>The contact potential difference is presented in relation to the electrokinetic potential and the surface potentials of the cells. © 1973 Springer-Verlag.</p>
Minc, S., Krzysztof Dołowy
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The Contact Difference of Potential Between Barium and Magnesium
Physical Review, 1938With the purpose of subjecting the electronic method of contact potential measurement to a thorough test for consistency with independent photoelectric work function determinations, the Volta potential Ba-Mg has been measured for some 30 pairs of surfaces and the results compared with recent careful photoelectric studies of these metals.
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Contact Potential Difference Measurements by the Kelvin Method
Proceedings of the Physical Society. Section B, 1957Measurements of contact potential differences between clean metallic surfaces produced by condensation from the vapour, by the vibrating condenser modification of the Kelvin method, yield the following values for average work functions, on the basis of an assumed value of 4.565 ± 0.025 eV for the work function of tungsten: copper, 4.52 ± 0.04 eV ...
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Estimation of Contact Potential Differences in Thermionic Energy Converters
Journal of Applied Physics, 1964The contact potential difference in a low-pressure thermionic energy converter can be written as CPD=[open phi]̃E−[open phi]̃C, where [open phi]̃E and [open phi]̃C are averaged work functions of the emitter and collector, respectively. The estimation of [open phi]̃E and [open phi]̃C from existing work-function data is discussed.
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