Colloidal caterpillars for cargo transportation
Colloidal caterpillars for cargo transportation
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用于货物运输的胶体毛毛虫
DOI：
10.1039/c4sm01354a
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发表时间：
2014
期刊：
影响因子：
3.4
通讯作者：
Yoshiki Hidaka and Hiroshi Orihara
中科院分区：
文献类型：
--
作者：
Yuji Sasaki;Yoshinori Takikawa;V. S. R. Jampani;Hikaru Hoshikawa;Takafumi Seto;Christian Bahr;Stephan Herminghaus;Yoshiki Hidaka and Hiroshi Orihara
流体系统中微小物体的可调传输在不同的科学领域都有很高的要求，例如药物输送、远离平衡的活性物质和芯片实验室应用。在这里，我们报告的定向运动的胶体粒子和自组装胶体链在一个液晶矩阵使用电流体动力学对流（EHC）辊。颗粒周围分子取向的不对称变形导致-对于单个颗粒-从一个EHC辊到下一个的跳跃运动，以及-对于胶体链-在垂直于辊轴的方向上的毛虫状运动。我们演示了使用胶体链作为微牵引引擎，用于运输各种类型的微货物。
Tunable transport of tiny objects in fluid systems is demanding in diverse fields of science such as drug delivery, active matter far from equilibrium, and lab-on-a-chip applications. Here, we report the directed motion of colloidal particles and self-assembled colloidal chains in a nematic liquid crystal matrix using electrohydrodynamic convection (EHC) rolls. The asymmetric distortion of the molecular orientation around the particles results – for single particles – in a hopping motion from one EHC roll to the next and – for colloidal chains – in a caterpillar-like motion in the direction perpendicular to the roll axes. We demonstrate the use of colloidal chains as microtraction engines for the transport of various types of microcargo.