Abstract A hydrophobic ratchet which consisted of teeth with gradient inclination was prepared in this work. The dynamic behaviors of resonant drops on the ratchet were experimentally investigated using a high-speed camera. According to our results, there are four types of behaviors of a resonant drop on the ratchet, including deformation in situ, wriggling, jumping and breaking up. For a wriggling or jumping drop, the drop can move directionally from the big to small inclination area. A new method to manipulate drop motion is proposed through combining the ratchet with vertical mechanical vibration. Moreover, the motion mechanism is presented on the basis of force analysis. Besides, the effects of amplitude, initial position and drop size on the drop acceleration and velocity are also discussed.

中文翻译：

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具有梯度倾斜的疏水棘轮上共振液滴的定向运动

摘要 本工作制备了一种由梯度倾斜齿组成的疏水棘轮。使用高速相机对棘轮上共振液滴的动态行为进行了实验研究。根据我们的研究结果，棘轮上的共振滴有四种行为，包括原位变形、蠕动、跳跃和破碎。对于蠕动或跳跃的跌落，跌落可以从大倾斜区域向小倾斜区域定向移动。通过将棘轮与垂直机械振动相结合，提出了一种操纵液滴运动的新方法。此外，运动机制是在力分析的基础上提出的。此外，还讨论了振幅、初始位置和液滴尺寸对液滴加速度和速度的影响。