Cathodic Evolution of Hydrogen at Very High Current Densities

Nature ◽  
1950 ◽  
Vol 165 (4193) ◽  
pp. 403-404 ◽  
Author(s):  
A. M. AZZAM ◽  
J. O'M. BOCKRIS
Keyword(s):  
High Current ◽  
Current Densities ◽  
Very High

P-N junction in very degenerate semiconductor at very high current densities

1965 ◽  
Vol 3 (8) ◽  
pp. lxx-lxxi
Author(s):  
A.I. Imenkov ◽  
M.M. Koslov ◽  
D.N. Nasledov ◽  
B.V. Tsarenkov
Keyword(s):  
High Current ◽  
Degenerate Semiconductor ◽  
Current Densities ◽  
Very High

scholarly journals On the critical current for the charge density wave transport

2002 ◽  
Vol 12 (9) ◽  
pp. 127-128
Author(s):  
A. A. Sinchenko ◽  
S. G. Zybtsev ◽  
I. G. Gorlova ◽  
Yu. I. Latyshev ◽  
V. Ya. Pokrovskii ◽  
...  
Keyword(s):  
Charge Density ◽  
Charge Density Wave ◽  
Density Wave ◽  
Metallic State ◽  
High Current ◽  
Point Contacts ◽  
One Dimensional ◽  
Wave Transport ◽  
Current Densities ◽  
Very High

We report transport measurements under very high current densities j, up to 108 A/cm2, of quasi-one-dimensional charge-density wave (CDW) conductors NbSe3 and TaS3. Above $j_0-10^1$ A/cm2 the point contacts NbSe3-NbSe3 show a sharp singularity, and the TaS3 nanosamples show metallic temperature dependence (positive dR/dn. We interpret both results as an evidence for the suppression of the Peierls gap 2A and development of the metallic state above j0. Possible scenarios of the Peierls state destruction are discussed.

scholarly journals ELECTROOSMOSIS IN NITELLA

1957 ◽  
Vol 41 (2) ◽  
pp. 383-396 ◽  
Author(s):  
L. R. Blinks ◽  
R. L. Airth
Keyword(s):  
Current Flow ◽  
Water Movement ◽  
High Current ◽  
Negative Pole ◽  
Low Salt ◽  
Current Densities ◽  
External Connection ◽  
Very High ◽  
Bioelectric Potentials

The role of electroosmosis was studied directly in Nitella. The cells were mounted in a water-tight barrier between two chambers containing reversible electrodes for the application of potentials, and fitted with calibrated capillaries to measure water movement. No water movement was found when small existing bioelectric potentials were short-circuited through an external connection, nor when external potentials up to 1 or 2 volts were applied (producing currents up to 5 µa). Higher potentials (up to 10 volts) caused small movements of water, toward the negative pole. Larger and often irreversible water movements were produced by potentials up to 20 volts—sometimes persisting after current flow. A variety of evidence suggests that the effects are caused by injury at the cathodal end of the cell, allowing water to be attracted osmotically at the intact end and forced out at the injured end (transosmosis). This injury is reversible under small applied potentials, irreversible after large ones (100 to 200 times the natural bioelectric values). Such water flows persist in low salt concentrations (up to 0.09 M NaCl) but almost completely vanish in isotonic (0.26 M) mannitol. This confirms the osmotic, rather than the electroosmotic nature of the water movement. It is estimated that electroosmosis cannot account for more than 1 per cent of the water movement (or turgor) in Nitella cells. The dead cellulose walls display a small electroosmotic water flow at very high current densities (under 20 volts applied potential).

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