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Patterning of Microorganisms and Microparticles through Sequential Capillarity-assisted Assembly
Published on: November 4, 2021
Suction component in adhesion of mushroom-shaped microstructure
Lars Heepe1, Michael Varenberg, Yan Itovich
1Department of Functional Morphology and Biomechanics, Zoological Institute, University of Kiel, Kiel, Germany. heepe@zoologie.uni-kiel.de
Journal of the Royal Society, Interface
|September 10, 2010
Summary
Suction contributes significantly to the adhesion of mushroom-shaped microstructures, especially at high speeds. This biomimetic adhesive also shows promise for dynamic pick-and-drop applications, even in a vacuum.
Area of Science:
- Biomimetics
- Adhesion Science
- Materials Science
Background:
- Microstructures with mushroom-shaped terminal elements are inspired by nature for adhesive applications.
- Understanding the forces governing adhesion is crucial for designing effective biomimetic materials.
Purpose of the Study:
- To investigate the role of suction in the adhesion of mushroom-shaped microstructures.
- To compare pull-off forces on structured and smooth surfaces under varying conditions.
- To assess the adhesive capabilities in dynamic pick-and-drop processes and vacuum environments.
Main Methods:
- Pull-off force measurements were conducted at different retraction velocities.
- Experiments were performed on both structured and smooth surfaces.
- Varying pressure conditions were applied during testing.
Main Results:
- Suction was found to contribute up to 10% of the pull-off force on structured surfaces at high velocities.
- The adhesive ability is not solely dependent on van der Waals forces.
- Visco-elastic properties of the structured surfaces differ from the bulk material.
Conclusions:
- Suction plays a notable role in the adhesion mechanism of these microstructures.
- The biomimetic adhesive demonstrates suitability for dynamic pick-and-drop operations.
- Sufficient adhesive capability is maintained under vacuum conditions.
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