论文标题
复杂等离子体中的活跃Janus颗粒
Active Janus particles in a complex plasma
论文作者
论文摘要
实验研究了悬浮在等离子体中的活性Janus颗粒。 Janus颗粒是微米大小的塑料微球，其中一半涂有薄薄的铂层。它们被悬浮在低压下氩气射流放电的血浆鞘中。 Janus颗粒在特征性的循环轨迹中移动，表明旋转运动和盘旋运动的结合；它们的相互作用导致以非Maxwellian速度分布为特征的丰富动态出现。讨论了粒子推进机制，驱动颗粒运动的主要力被鉴定为光生力。
Active Janus particles suspended in a plasma were studied experimentally. The Janus particles were micron-size plastic microspheres, one half of which was coated with a thin layer of platinum. They were suspended in the plasma sheath of a radio-frequency discharge in argon at low pressure. The Janus particles moved in characteristic looped trajectories suggesting a combination of spinning and circling motion; their interactions led to the emergence of rich dynamics characterized by non-Maxwellian velocity distribution. The particle propulsion mechanism is discussed, the main force driving the particle motion is identified as photophoretic force.
