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Effect of Electrostatic Interactions on Frictional Forces in Electrolytes
Abstract We propose a theoretical description of frictional phenomena in nanoscale layers of electrolyte solutions embedded between two plates, one of which is externally driven. It is shown that a presence of nonuniform charge distributions on the plates leads to a space-dependent frictional force, which enters into the equation of motion for the top driven plate. The equation displays a rich spectrum of dynamical behaviors: periodic stick-slip, erratic and intermittent motions, characterized by force fluctuations, and sliding above the critical velocity. Boundary lines separating different regimes of motion in a dynamical phase diagram are determined. The dependencies of the frictional force and regimes of motion on an electrolyte concentration, surface charge distribution and a thickness of the liquid layer are predicted.
Effect of Electrostatic Interactions on Frictional Forces in Electrolytes
Abstract We propose a theoretical description of frictional phenomena in nanoscale layers of electrolyte solutions embedded between two plates, one of which is externally driven. It is shown that a presence of nonuniform charge distributions on the plates leads to a space-dependent frictional force, which enters into the equation of motion for the top driven plate. The equation displays a rich spectrum of dynamical behaviors: periodic stick-slip, erratic and intermittent motions, characterized by force fluctuations, and sliding above the critical velocity. Boundary lines separating different regimes of motion in a dynamical phase diagram are determined. The dependencies of the frictional force and regimes of motion on an electrolyte concentration, surface charge distribution and a thickness of the liquid layer are predicted.
Effect of Electrostatic Interactions on Frictional Forces in Electrolytes
Daikhin, L.I. (author) / Urbakh, M. (author)
2001-01-01
16 pages
Article/Chapter (Book)
Electronic Resource
English
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