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Review Article

Bioinspired directional liquid transport induced by the corner effect

Zhongyu Shi1Zhongxue Tang1Bojie Xu1Lei Jiang1,2Huan Liu1,2( )
Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry, Beihang University, Beijing 100191, China
Research Institute for Frontier Science, Beihang University, Beijing 100191, China
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Graphical Abstract

Bioinspired directional liquid transport (DLT), especially those aroused by the corner effect, has witnessed advantages in mass/energy transfer. Here, we reviewed recent research progresses in this field, including the representative natural organisms, the interfacial mechanisms, bioinspired artificial materials, and perspectives in liquid manipulation.

Abstract

Many natural creatures have demonstrated unique abilities in directional liquid transport (DLT) for better adapting to the local environment, which, for a long time, have inspired the material fabrication for applications in microfluidics, self-cleaning, water collection, etc. Recently, DLTs aroused by the corner effect have been witnessed in various natural organisms, where liquid transports/spreads spontaneously along the corner structures in microgrooves, wedges or conical structures driven by micro-/nano- scaled capillary forces without external energy input. Particularly, these DLTs show advantages of ultrahigh speed, continuous proceeding, and/or external controllability. Here, we reviewed recent research advances on the bioinspired DLTs induced by the corner effect, as well as the involved mechanisms and the artificial counterpart materials with various applications. We also introduced some bioinspired materials that are capable of stimulus-responsive DLT under external fields. Finally, we suggested perspectives of the bioinspired DLTs in liquid manipulations.

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Nano Research
Pages 3913-3923
Cite this article:
Shi Z, Tang Z, Xu B, et al. Bioinspired directional liquid transport induced by the corner effect. Nano Research, 2023, 16(3): 3913-3923. https://doi.org/10.1007/s12274-022-4866-5
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Received: 29 May 2022
Revised: 08 July 2022
Accepted: 03 August 2022
Published: 24 September 2022
© Tsinghua University Press 2022
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