Nanoparticle coagulation in fractionally charged and charge fluctuating dusty plasmas

Nunomura, Shota; Shiratani, Masaharu; Koga, Kazunori; Kondo, Michio; Watanabe, Yukio
August 2008
Physics of Plasmas;Aug2008, Vol. 15 Issue 8, p080703
Academic Journal
The kinetics of nanoparticle coagulation has been studied in fractionally charged and charge fluctuating dusty plasmas. The coagulation occurs when the mutual collision frequency among nanoparticles exceeds their charging and decharging/neutralization frequency. Interestingly, the coagulation is suppressed while a fraction (several percent) of nanoparticles are negatively charged in a plasma, in which stochastic charging plays an important role. A model is developed to predict a phase diagram of the coagulation and its suppression.


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