Effect of ambipolar fluxes on nanoparticle charging in low-pressure glow discharges
Data(s) |
2005
|
---|---|
Resumo |
The effect of ambipolar fluxes on nanoparticle charging in a typical low-pressure parallel-plate glow discharge is considered. It is shown that the equilibrium values of the nanoparticle charge in the plasma bulk and near-electrode areas are strongly affected by the ratio S ath i of the ambipolar flux and the ion thermal velocities. Under typical experimental conditions the above ratio is neither S ath i≪ 1 nor S ath i≫1, which often renders the commonly used approximations of the purely thermal or "ion wind" ion charging currents inaccurate. By using the general approximation for the ambipolar drift-affected ion flux on the nanoparticle surface, it appears possible to obtain more accurate values of the nanoparticle charge that usually deviate within 10-25 % from the values obtained without a proper accounting for the ambipolar ion fluxes. The implications of the results obtained for glow discharge modeling and nanoparticle manipulation in low-pressure plasmas are discussed. |
Formato |
application/pdf |
Identificador | |
Publicador |
The American Physical Society |
Relação |
http://eprints.qut.edu.au/74019/1/74019%28pub%29.pdf DOI:10.1103/PhysRevE.71.026405 Ostrikov, K. (2005) Effect of ambipolar fluxes on nanoparticle charging in low-pressure glow discharges. Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), 71(2), 026405-1. |
Direitos |
Copyright 2005 The American Physical Society |
Fonte |
Science & Engineering Faculty |
Tipo |
Journal Article |