Capillary motor driven by electrowetting
Capillary motor driven by electrowetting
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DOI：
10.1039/c001211d
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发表时间：
2010-01-01
期刊：
影响因子：
6.1
通讯作者：
Shomoyama, Isao
中科院分区：
文献类型：
--
作者：
Takei, Atsushi;Matsumoto, Kiyoshi;Shomoyama, Isao
支撑在液滴上的微结构受到毛细管力的作用，并根据其形状进行排列。如果液滴底部的边界条件和微结构是非圆形的，则毛细管扭矩会施加在结构上。扭矩的方向由边界条件和结构的位置决定。通过不断改变边界条件，实现了板的旋转运动。液滴的边界条件由电润湿控制。我们在支撑液滴的板上形成环形电极图案。通过改变施加电压的电极，改变边界条件并且旋转板。在这种方法中，液滴和板充当毛细管马达。我们报告了毛细管马达的特性与其旋转运动之间的关系。我们将 3.0 μL 的水滴夹在两个板之间，并实现了最大 720 rpm 的旋转运动。
A micro-structure supported on a droplet is subjected to capillary force and aligned dependent on its shape. If the droplet's boundary conditions at the bottom and the micro-structure are non-circular, capillary torque is exerted on the structures. The direction of torque is determined by the boundary conditions and the position of the structure. By changing the boundary conditions continuously, rotational motion of a plate was achieved. The boundary conditions of the droplet were controlled by electrowetting. We patterned electrodes in an annular shape on the plate supporting the droplet. By changing the voltage-applied electrodes, the boundary conditions were changed and the plate is rotated. The droplet and the plate worked as a capillary motor with this method. We report the relationship between the characteristics of the capillary motor and its rotational motion. We sandwiched a 3.0-mu L water droplet between two plates and achieved a rotational motion of 720 rpm at maximum.