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Related Concept Videos

Surface Tension of Fluid01:22

Surface Tension of Fluid

Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
Surface tension varies with...

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Multiscale Structures Aggregated by Imprinted Nanofibers for Functional Surfaces
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Sandgrouse Feather-Inspired Multiscale Hierarchical Microstructured Surfaces via IICSA for Controlled Liquid

Fushuai Wang1,2, Quanzi Yuan2,3, Xinghua Shi1,3

  • 1Laboratory of Theoretical and Computational Nanoscience, National Center for Nanoscience and Technology, Chinese Academy of Sciences, Beijing, People's Republic of China.

Small Methods
|June 30, 2026
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel bioinspired surface mimicking sandgrouse feathers for advanced liquid control. This scalable method creates large-area hierarchical structures for superior adhesion, capture, and oil-water separation.

Keywords:
bio‐inspiredliquid behavior regulationmultiscale hierarchical microstructuresmulti‐level capillary actionthree‐phase contact line

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Published on: February 11, 2020

Area of Science:

  • Materials Science
  • Surface Engineering
  • Bioinspired Design

Background:

  • Bioinspired surfaces offer potential for liquid behavior regulation.
  • Fabrication challenges include limited area, poor replication of biological structures, and inadequate morphological control.

Purpose of the Study:

  • To develop a scalable and controllable method for fabricating bioinspired surfaces.
  • To replicate the multiscale hierarchical morphology and liquid-handling properties of sandgrouse belly feathers.
  • To investigate the liquid regulation mechanisms of the fabricated surfaces.

Main Methods:

  • Instability-induced crystallization self-assembly (IICSA) was employed.
  • Replication of the "rachis-barb-barbule-chirality" multiscale hierarchical microstructured surface (>200 cm²).
  • Evaluation of droplet adhesion, high-speed impact capture, and oil-water separation performance.

Main Results:

  • The microstructured surface achieved excellent droplet adhesion, suspending 32 µL vertically and 80 µL horizontally.
  • High-speed impact capture suppressed rebound, jetting, and splashing at 2.62 m s⁻¹.
  • Exceptional oil-water separation efficiency below the detection limit of FTIR was achieved, outperforming conventional methods.

Conclusions:

  • The IICSA method provides a simple, scalable, and controllable approach for constructing bioinspired functional structures.
  • The fabricated surfaces enable precise liquid manipulation and high-purity separation.
  • Multi-level capillary action and contact line pinning synergistically govern the liquid regulation.