Polarization of active Janus particles
Polarization of active Janus particles
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DOI：
10.1103/physreve.89.050303
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发表时间：
2014-05-14
影响因子：
2.4
通讯作者：
Wuerger, Alois
中科院分区：
文献类型：
--
作者：
Bickel, Thomas;Zecua, Guillermo;Wuerger, Alois
我们从理论上研究表面活性Janus粒子的运动，由于不均匀的温度或浓度场的有效滑移速度驱动。利用热阱中实现的参数，我们发现梯度所施加的扭矩。抑制旋转扩散并有利于粒子轴的排列。在一群活跃的粒子中，这种极化为漂移速度增加了一个新的项，并修改了集体行为。利用非均匀激光束的自偏振特性，可以引导热粒子沿着给定轨迹运动。
We theoretically study the motion of surface-active Janus particles, driven by an effective slip velocity due to a nonuniform temperature or concentration field.. With parameters realized in thermal traps, we find that the torque exerted by the gradient.. inhibits rotational diffusion and favors alignment of the particle axes. In a swarm of active particles, this polarization adds a novel term to the drift velocity and modifies the collective behavior. Self-polarization in a nonuniform laser beam could be used for guiding hot particles along a given trajectory.