基于各向异性表面的液滴驱动

Droplet Self-Propulsion Based on Heterogeneous Surfaces

驱动液滴实现各种动态行为在生物医学、微流控、痕量检测等领域具有重要应用。液滴的驱动主要依赖于对液滴不同位置受力的调节。具有浸润性差异或结构差异的各向异性表面,在对液滴进行驱动时具有操作简便、节约能源等优势,逐渐成为液滴操控领域的研究热点之一。本文结合本课题组的研究工作,对近年来利用各向异性表面驱动液滴的相关研究进行了综述。首先,分析了各向异性表面驱动液滴的基本原理。依据制备方法的不同,将各向异性表面分为浸润性各向异性表面、结构各向异性表面和协同各向异性表面三类,分别归纳了其常见制备方法和在液滴驱动领域的主要应用。最后,本文对各向异性表面驱动液滴的局限性和发展方向进行了总结和展望。

Actuating droplets for various dynamic behaviors has significant applications in the fields of biomedicine, microfluidics, and trace detection. The droplet movement depends on the adjustment of the forces on different positions of the droplets. Droplet self-propulsion based on heterogeneous surfaces shows advantages such as easy operation and energy conversation, which has been one of the research hotspots in droplet propulsion. In this article, recent research of droplet propulsion based on heterogeneous surfaces is reviewed. Firstly, the general principle of droplet self-propulsion based on surface heterogeneity is discussed. According to the different preparation methods, heterogeneous surfaces are divided into three categories: the heterogeneous wettability surface, the anisotropic structure surface and the synergistic surface. Their fabrications and applications are summarized, respectively. Finally, the limitations and the developments of heterogeneous surface are prospected and discussed.