几何受限二元溶剂中的光激活 Janus 粒子
Light-activated Janus particles in geometrically confined binary solvent
AI总结：
研究空间受限二元溶剂中光激活 Janus 粒子的自推进，用考虑局部相分离等效应的数值模拟，发现受限使推进速度降低、定向运动时间延长，取向动力学不限于二维，还阐明关键物理参数对粒子运动控制效率的意义。
AI中文摘要：
局部场的耦合动力学对空间受限二元溶剂中 Janus 粒子的光激活自推进有重大影响。本文通过数值模拟研究此问题，该模拟考虑了局部相分离、润湿现象及流体动力学效应。发现将二元溶剂限制在通道内会降低活性粒子的推进速度并延长其定向运动持续时间。此外，这种自推进粒子的取向动力学不限于二维。增加光强度会导致局部场强烈波动，进而使粒子速度波动。阐明了控制粒子运动控制效率的关键物理参数的重要性。
英文摘要：
The coupled dynamics of local fields exert a drastic influence on the light-activated self-propulsion of a Janus particle in a binary solvent under spatial confinement. In this work, we investigate this problem using numerical simulations that account for local phase separation and wetting phenomena, as well as hydrodynamic effects. We find that confining the binary solvent within a channel results in a reduction of the active particle's propulsion speed and an extension of the duration of its directed motion. Furthermore, the orientational dynamics of this self-propelled particle are not restricted to two dimensions, unlike the phenomenon known as "orientational quenching". Increasing the light intensity leads to strong fluctuations in the local fields and, consequently, in the particle's speed. In this context, the significance of key physical parameters governing the efficiency of particle motion control is elucidated.
