Stochastic Localization of Microswimmers by Photon Nudging
Stochastic Localization of Microswimmers by Photon Nudging
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DOI：
10.1021/nn501568e
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发表时间：
2014-07-01
期刊：
影响因子：
17.1
通讯作者：
Cichos, Frank
中科院分区：
文献类型：
--
作者：
Bregulla, Andreas P.;Yang, Haw;Cichos, Frank
实验证明了利用反馈机制对单个自推进Janus型粒子的无作用力捕获和操纵。粒子的位置和方向的实时信息被用来切换粒子的自推进机制光学。因此，颗粒的定向布朗运动提供了微游泳者的重定向机制。粒子大小的依赖性的电泳推进速度表明，光子轻推提供了一个增加的位置精度为减少粒子半径。所探索的转向机制适用于复杂生物环境中的航行和集体游泳效应的深入研究。
Force-free trapping and steering of single photophoretically self-propelled Janus-type particles using a feedback mechanism is experimentally demonstrated. Realtime information on particle position and orientation is used to switch the self-propulsion mechanism of the particle optically. The orientational Brownian motion of the particle thereby provides the reorientation mechanism for the microswimmer. The particle size dependence of the photophoretic propulsion velocity reveals that photon nudging provides an increased position accuracy for decreasing particle radius. The explored steering mechanism is suitable for navigation in complex biological environments and in-depth studies of collective swimming effects.