Quantum tunneling-enhanced charging of nanoparticles in plasmas

Details Quantum tunneling-enhanced charging of nanoparticles in plasmas Quantum tunneling-enhanced charging of nanoparticles in plasmas

2010-07-06

arxiv.org/abs/1007.0806v1

Phys. Rev. E 83, 046406 (2011)

Physics

Plasma Physics

14 pages, 4 figures, 2 tables

Scientific paper

10.1103/PhysRevE.83.046406

The role of quantum tunneling effect in the electron accretion current onto a negatively charged grain immersed in isotropic plasma is analyzed, within the quasiclassic approximation, for different plasma electron distribution functions, plasma parameters, and grain sizes. It is shown that this contribution can be small (negligible) for relatively large (micron-sized) dust grains in plasmas with electron temperatures of the order of a few eV, but becomes important for nano-sized dust grains (tens to hundreds nm in diameter) in cold and ultracold plasmas (electron temperatures ~ tens to hundreds of Kelvin), especially in plasmas with depleted high-energy "tails" in the electron energy distribution.

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