Rotating ellipsoidal catalytic micro-swimmers via glancing angle evaporation

Rotating ellipsoidal catalytic micro-swimmers via glancing angle evaporation
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通过掠射角蒸发旋转椭圆体催化微型游泳器

DOI:
10.1039/d1ma00533b
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发表时间:
2021
期刊:
影响因子:
5
通讯作者:
Kirvin A
Kirvin A
中科院分区:
--
文献类型:
--
作者:
Kirvin A

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通过以掠射角的催化剂沉积在椭圆形催化微游动装置中产生旋转的能力允许可靠地接近盘旋轨迹。这种行为可以使推进椭球体聚集货物,并在小尺度上增强混合。催化推进的胶体旋转先前已经在球形游泳装置中通过在催化剂沉积期间的相邻遮蔽实现,从而导致非对称涂层。然而,在这项工作中,阴影效应出现由于椭球体的固有各向异性,消除了一个紧密包装的胶体晶体单层的要求。我们使用催化剂沉积过程的几何分析和机械理解,提出了所观察到的轨迹和催化剂分布之间的联系,并建议进一步的路线,以提高控制的旋转速率。
The ability to generate rotation in ellipsoidal catalytic micro swimming devices by catalyst deposition at glancing angles allows reliable access to circling trajectories. This behaviour could enable propulsive ellipsoids to gather cargo and enhance mixing at small scales. Catalytically propelled colloidal rotation has been previously achieved in spherical swimming devices by means of neighbour shadowing during catalyst deposition leading to non-symmetrical coatings. However in this work shadowing effects arise due to the ellipsoid's inherent anisotropy, removing the requirement for a closely packed colloidal crystal monolayer. We use geometric analysis of the catalyst deposition process, and mechanistic understanding to propose a link between the observed trajectories and the catalyst distribution and suggest further routes to improve control of rotation rates.
DOI: 10.1021/la2033127
发表时间: 2011-10-18
期刊: LANGMUIR
影响因子: 3.9
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