Manipulation of droplets by dynamically controlled wetting gradients.
Manipulation of droplets by dynamically controlled wetting gradients.
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DOI：
10.1021/la046982t
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发表时间：
2005-03
期刊：
影响因子：
--
通讯作者：
R. Yamada;H. Tada
中科院分区：
文献类型：
--
作者：
R. Yamada;H. Tada
通过对润湿梯度的时空控制，实现了液滴的可逆传输。利用二茂铁基(FC)烷硫醇单分子膜的电化学反应可逆地调节表面润湿，并通过在衬底上施加面内偏置电压来产生润湿梯度。润湿边界的来回运动，使表面从润湿变为排斥，从而导致液滴在表面单向扩散和收缩。这些单向变形导致液滴以蠕虫状的方式净运输。当面内偏置电压方向相反时，液滴向后移动。
The reversible transportation of droplets was realized by spatiotemporal control of the wetting gradient. The surface wetting was reversibly regulated by using electrochemical reactions of the ferrocenyl (Fc) alkanethiol monolayer, and the wetting gradient was generated by the application of the in-plane bias voltage to the substrate. The back-and-forth motion of the wetting boundary, where the surface changed from wetting to repulsive, sequentially caused a droplet unidirectional spreading and shrinking on the surface. These unidirectional deformations resulted in the net transport of the droplet in an inchwormlike manner. The droplet moved backward when the direction of the in-plane bias voltage was reversed.