晶体表面上的毛滴运动

IF 38.1 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xin Tang, Wei Li, Liqiu Wang
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引用次数: 26

摘要

定向液体运动的传统介导方式是在目标表面上对化学不均匀性或拓扑各向异性进行功能化。在这里,我们展示了液滴在压电单晶体上按明确方向毛化的自推进过程,而不存在任何明显的不对称或外力。通过选择与液滴接触的晶体平面,热弹性-压电相互作用产生了错综复杂的电动势剖面,实现了各种形式的自推进,包括单向、分叉和三叉。这种效应源于各向异性的晶体结构,它产生了截然不同的宏观液体行为,在冷/热液滴和挥发性液滴中均可观察到。本征定向液体运动在软物质工程、自主材料输送和热管理以及生化分析等过程中具有广泛的适用性。落在非润湿平面上的液滴会随机滚动。Tang 等人发现,通过压电晶体平面的交界面,液滴可沿毛刺方向自我推进,这种运动由跨尺度热压电耦合推动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Furcated droplet motility on crystalline surfaces

Furcated droplet motility on crystalline surfaces
Directed liquid motion has been conventionally mediated by functionalizing chemical inhomogeneity or texturing topological anisotropy on target surfaces. Here we show the self-propulsion of droplets that furcated in well-defined directions on piezoelectric single crystals in the absence of any apparent asymmetry or external force. By selecting the crystal plane to interface with the droplets, the thermoelastic–piezoelectric interplay yields intricate electric potential profiles, enabling various forms of self-propulsion including unidirectional, bifurcated and trifurcated. This effect originates from an anisotropic crystalline structure that generates contrasting macroscopic liquid behaviours and is observed with cold/hot and volatile droplets. Intrinsically oriented liquid motions have broad applicability in processes ranging from soft matter engineering, autonomous material delivery and thermal management to biochemical analysis. A droplet falling on a non-wetting plane is expected to randomly roll. Tang et al. uncover that by interfacing piezoelectric crystal plane, droplets self-propel in a furcated direction, a motility fuelled by cross-scale thermo-piezoelectric coupling.
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来源期刊
Nature nanotechnology
Nature nanotechnology 工程技术-材料科学:综合
CiteScore
59.70
自引率
0.80%
发文量
196
审稿时长
4-8 weeks
期刊介绍: Nature Nanotechnology is a prestigious journal that publishes high-quality papers in various areas of nanoscience and nanotechnology. The journal focuses on the design, characterization, and production of structures, devices, and systems that manipulate and control materials at atomic, molecular, and macromolecular scales. It encompasses both bottom-up and top-down approaches, as well as their combinations. Furthermore, Nature Nanotechnology fosters the exchange of ideas among researchers from diverse disciplines such as chemistry, physics, material science, biomedical research, engineering, and more. It promotes collaboration at the forefront of this multidisciplinary field. The journal covers a wide range of topics, from fundamental research in physics, chemistry, and biology, including computational work and simulations, to the development of innovative devices and technologies for various industrial sectors such as information technology, medicine, manufacturing, high-performance materials, energy, and environmental technologies. It includes coverage of organic, inorganic, and hybrid materials.
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