Results 251 to 260 of about 14,225,696 (298)

On the Measurement of Contact Differences of Potential

Proceedings of the Physical Society of London, 1910
The Paper describes two methods of measuring the contact differences of potential of pairs of metals. The first, or deflection, method depends on the property which a radioactive source has of destroying a field of electrostatic force in air, and the second, or null, method on the possibility of determining by means of such a source whether such a ...
A Anderson, J E Bowen
openaire   +1 more source

A cryostat for measuring contact potential differences

Journal of Physics E: Scientific Instruments, 1977
A cryostat is described that is designed to measure changes in the contact potential difference between a normal metal and a superconductor as the superconductor passes through the transition temperature. The Kelvin-Zisman technique is used and the vibrating plate is driven with a commercially produced vibrator.
M Shott, A J Walton
openaire   +1 more source

Quantum oscillations of the contact potential difference

Soviet Journal of Low Temperature Physics, 1987
It is shown that, because of screening, quantum oscillations, owing to the oscillations of the chemical potential in the bulk of the metal, in the contact potential difference in a magnetic field are determined by the factor ∼ exp(− D/H/rs) (DH is the diameter of the electron orbit in a magnetic field and rs is the screening radius).
S. G. Semenchinskiĭ, V. S. Édel’man
openaire   +1 more source

Self-Contact and Fictitious Domain Using a Difference Convex Approach

International Journal for Numerical Methods in Engineering, 2008
International audienceA numerical approach of contact or self-contact of thin Structures is performed using a relaxed orientation-preserving condition inserted in the difference of convex function framework.
S Pagano
exaly   +2 more sources

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
openaire   +1 more source

A Modified Kelvin Method for Measuring Contact Potential Differences

Review of Scientific Instruments, 1946
A simple, rugged, and reliable apparatus for the measurement of contact potential differences (in the future abbreviated CPD) by a modified Kelvin method is described. The null circuit using a 6F5 as electrometer tube has a sensitivity of 0.5-cm scope deflection/mv of CPD/cm2 sample area, which permits the CPD to be determined to 1/100 volt for samples
W E, MEYERHOF, P H, MILLER
openaire   +2 more sources

Measurement of Surface Potential or Contact Potential Differences

Review of Scientific Instruments, 1946
The term ``surface potential'' is recommended as preferable to ``contact potential'' when surface effects are being studied. The use of a pH meter for measurement of surface potentials is described.
openaire   +2 more sources

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
openaire   +1 more source

The contact potential difference of powder and the tribo-charge

Journal of Electrostatics, 1996
Abstract The contact potential difference (CPD) against Au (reference material) was measured directly for resin coated particles and solid wall materials. Furthermore, tribo-charging between these particles and the wall materials has been examined based on the work function estimated by the measured CPD-values.
Takayuki Itakura, Hiroaki Masuda, Chiyo Ohtsuka, Shuji Matsusaka   +3 more
openaire   +1 more source

The contact potential difference or Volta potential

1958
Sometime in 1801, Volta, who, together with Galvani, was responsible for the development of the galvanic cell, Voltaic pile, or, in short, the electrolytic cell, believed that there was an intrinsic potential difference between dry metals in no way related to the electrolytic phenomena occurring between metals in solutions.
openaire   +1 more source