Results 201 to 210 of about 3,483,841 (243)

Piezoelectric driven Kelvin probe for contact potential difference studies

Review of Scientific Instruments, 1976
A convenient piezoelectric driven Kelvin probe for the measurement of work function changes is described. The probe has a simple construction, is small, bakeable, and can be mounted on any 35-mm-i.d. UHV flange. As the piezoelectric device is inside the vacuum chamber, only one electrical feedthrough is needed for operating the probe.
K. Besocke, S. Berger
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The charging of ice by differences in contact potential

Journal of Geophysical Research: Atmospheres, 1985
Laboratory experiments measuring the charge transferred when individual 100‐μm ice spheres impact upon various metal targets show that the charge transferred depends upon the work function of the metal. If ice is assigned a “work function” of 4.3 eV, then the contact potential difference between the ice and the metal accounts for the observed charging.
J. M. Caranti, A. J. Illingworth, S. J. Marsh   +2 more
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The relation between contact charging and surface potential differences

Journal of Colloid and Interface Science, 1970
Abstract The surface potentials of several optically flat metal plates were varied by controlled contamination of their surfaces. When the plates were placed in contact with an insulator, it was found that the quantity of charge remaining after the contact was broken was a linear function of the measured surface potential.
R.G Cunningham, H.P Hood
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Contact potential difference and work function of organic crystals

Discussions of the Faraday Society, 1971
The vibrating condenser method was applied for measurement of the contact potential difference with organic crystals. It gave work functions of reasonable values for aromatic hydrocarbon crystals. From the work function, combined with other observable parameters, an energy diagram for the crystals can be constructed, which indicates that the location ...
Masahiro Kotani, Hideo Akamatu
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A new pendulum device to measure contact potential differences

Applied Physics, 1974
Using a variation of Kelvin's vibrating capacitor technique a new method is described to measure contact potential differences (CPD). The main advantage of this pendulum device is the fact that the variation of CPD, performed, for example, by bombarding the electrode under investigation with an atomic beam, can be measured quasicontinously.
J. Hölzl, P. Schrammen
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Contact Potential Difference between Sensitizing Dye and Substrate*

Journal of the Optical Society of America, 1956
The contact potential difference between cadmium sulfide and the sensitizing dyes pinacyanole, kryptocyanine, and neocyanine has been measured by the electron beam retardation method and found to be of the order of 0.3 v in each case. That between silver bromide and pinacyanole has also been measured to be 0.38 v, the dye in all cases having the ...
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Influence of contact potential difference and electric potential on the microhardness of metals

Physics of the Solid State, 2009
The effect of the electric potential on the microhardness of aluminum, zirconium, and ferrosilicon was studied experimentally. The effect of the proper electric potential applied to a sample is compared with the effect of the potential induced by the contact potential difference upon contact with metals with a different electron work function.
L. B. Zuev, V. I. Danilov, S. V. Konovalov, R. A. Filip’ev, V. E. Gromov   +4 more
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Contact Potential Difference Measurements by the Kelvin Method

Proceedings of the Physical Society. Section B, 1957
Measurements 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, 1964
The 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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The Contact Difference of Potential Between Barium and Magnesium

Physical Review, 1938
With 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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