Designing of anisotropic gradient surfaces for directional liquid transport: Fundamentals, construction, and applications

纳米技术 仿生学 各向异性 材料科学 润湿 工程物理 工程类 物理 光学 复合材料
作者
Lanlan Hou,Xiaofei Liu,Xinran Ge,Rongjun Hu,Zhimin Cui,Nü Wang,Yong Zhao
出处
期刊:The Innovation [Elsevier]
卷期号:4 (6): 100508-100508 被引量:16
标识
DOI:10.1016/j.xinn.2023.100508
摘要

Many biological surfaces are capable of transporting liquids in a directional manner without energy consumption. Inspired by nature, constructing asymmetric gradient surfaces to achieve desired droplet transport, such as a liquid diode, brings an incredibly valuable and promising area of research with a wide range of applications. Enabled by advances in nanotechnology and manufacturing techniques, biomimetics has emerged as a promising avenue for engineering various types of anisotropic material system. Over the past few decades, this approach has yielded significant progress in both fundamental understanding and practical applications. Theoretical studies revealed that the heterogeneous composition and topography mainly govern the wetting mechanisms and dynamics behavior of droplets, including the interdisciplinary aspects of materials, chemistry, and physics. In this review, we provide a concise overview of various biological surfaces that exhibit anisotropic droplet transport. We discussed the theoretical foundations and mechanisms of droplet motion on designed surfaces and reviewed recent research advances in droplet directional transport on designed plane surfaces and Janus membranes. Such liquid-diode materials yield diverse promising applications, involving droplet collection, liquid separation and delivery, functional textiles, and biomedical applications. We also discuss the recent challenges and ongoing approaches to enhance the functionality and application performance of anisotropic materials.
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