中国物理B ›› 2016, Vol. 25 ›› Issue (6): 65203-065203.doi: 10.1088/1674-1056/25/6/065203
• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇 下一篇
Xiang-Mei Liu(刘相梅), Qi-Nan Li(李奇楠), Rui Li(李瑞)
Xiang-Mei Liu(刘相梅), Qi-Nan Li(李奇楠), Rui Li(李瑞)
摘要:
The nanoparticle coagulation is investigated by using a couple of fluid models and aerosol dynamics model in argon with a 5% molecular acetylene admixture rf microdischarges, with the total input gas flow rate of 400 sccm. It co-exists with a homogeneous, secondary electron-dominated low temperature γ-mode glow discharges. The heat transfer equation and flow equation for neutral gas are taken into account. We mainly focused on investigations of the nanoparticle properties in atmospheric pressure microdischarges, and discussed the influences of pressure, electrode spacing, and applied voltage on the plasma density and nanoparticle density profiles. The results show that the characteristics of microdischarges are quite different from those of low pressure radio-frequency discharges. First, the nanoparticle density in the bulk plasma in microdischarges is much larger than that of low pressure discharges. Second, the nanoparticle density of 10 nm experiences an exponential increase as soon as the applied voltage increases, especially in the presheath. Finally, as the electrode spacing increases, the nanoparticle density decreased instead of increasing.
中图分类号: (Dusty or complex plasmas; plasma crystals)