The motion of three-phase contact line of a droplet is always halted by the contact angle hysteresis on a common solid surface. In this work, the Ag/Cu surface and Cu(OH)₂/Cu surface with water contact angle of 25.0° were fabricated and found favorable for two-component droplet moving. The droplet, water with propylene glycol in irregular shape could restore to a circle (top view) on these prepared surfaces. Inspired by the shape restoration, the directed motion of two-component droplet without back-end pinning was achieved on both the wedge-shaped Ag/Cu and Cu(OH)₂/Cu composite surfaces. The two-component droplet moves in a way of the front-end spreading with the subsequent back-end shrinking. The needle-like Cu(OH)₂ microstructure is more conducive to the front-end spreading, while the spheroidal Ag particles on Cu substrate is in favor of the back-end shrinking. In addition, the segmented Ag@Cu(OH)₂/Cu wedge-shaped composite surfaces with Ag film on the narrow end of the track and Cu(OH)₂ on the wide end could enhance the droplet moving. Finally, a micro-chemical reactor was designed capable of driving two dispersed droplets to move in a specific direction, converge, and then react with each other.

液滴的三相接触线的运动总是由于公共固体表面上的接触角滞后而停止。在该工作中，制造了具有25.0°的水接触角的Ag / Cu表面和Cu（OH）₂ / Cu表面，发现其有利于两组分液滴的移动。水滴，带有不规则形状的丙二醇的水可以在这些准备好的表面上恢复成圆形（俯视图）。受形状恢复的启发，在楔形Ag / Cu和Cu（OH）₂ / Cu复合材料表面上均实现了无后端钉扎的两组分液滴的定向运动。两组分液滴以前端扩散的方式移动，随后后端收缩。针状Cu（OH）₂微观结构更有利于前端扩展，而Cu基体上的球形Ag颗粒有利于后端收缩。此外，分段的Ag @ Cu（OH）₂ / Cu楔形复合表面在轨道的窄端带有Ag膜，在宽端带有Cu（OH）₂可以增强液滴的运动。最后，设计了一种微化学反应器，该反应器能够驱动两个分散的液滴沿特定方向移动，会聚然后相互反应。