Dust as a surfactant

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Date
2003
Volume
5
Issue
Journal
New Journal of Physics
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Publisher
[London] : IOP
Abstract

We argue that dust immersed in a plasma sheath acts as a surfactant. By considering the momentum balance in a plasma sheath, we evaluate the dependence of the plasma surface pressure on the dust density. It is shown that the dust may reduce the surface pressure, giving rise to a sufficiently strong tangential force. The latter is capable of confining the dust layer inside the sheath in the direction perpendicular to the ion flow.

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CC BY-NC-SA 4.0 Unported