Directional motion of dust particles at different gear structures in a plasma
Dai Chao-Xing, Song Chao, Zhou Zhi-Xiang, Sun Wen-Tao, Guo Zhi-Qiang, Liu Fu-Cheng, He Ya-Feng
       

Distribution of dust particles within several sawteeth along the saw channel. Colored lines indicate the trajectories of dust particles during 0.6 s. Circle on each trajectory marks the starting point of the trajectory. Gas pressure: 40 Pa, RF power: 25 W. Here + and − beside the white arrow define the motion directions. Particle brightness has been appropriately enhanced.