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Updated: Jul 8, 2025
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Atomic Force Microscopy Cantilever-Based Nanoindentation: Mechanical Property Measurements at the Nanoscale in Air and Fluid
Published on: December 2, 2022
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Nanoscale-roughness influence on pull-off adhesion force in liquid and air
R BakhshandehSeraji1, G Palasantzas1
1Department of Physics, Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
Physical Review. E
|December 20, 2023
Summary
Adhesion forces were measured in air and water using atomic force microscopy. Increased surface roughness significantly reduced adhesion in water compared to air, influenced by nanobubbles.
Area of Science:
- Surface science
- Nanotechnology
- Adhesion science
Background:
- Understanding adhesion forces is crucial for material science and nanotechnology applications.
- Nanobubbles can significantly influence interfacial phenomena at the nanoscale.
- Atomic force microscopy (AFM) is a key tool for probing nanoscale interactions.
Purpose of the Study:
- To compare pull-off adhesion forces in air and water.
- To investigate the effect of surface roughness on adhesion.
- To analyze the role of nanobubbles in capillary adhesion.
Main Methods:
- Atomic force microscopy (AFM) in sphere-plate geometry.
- Measurements conducted in both air and deionized water.
- Varying surface roughness and retraction velocities were employed.
Main Results:
- Pull-off force in air was significantly higher than in water.
- Adhesion force decreased monotonically with increasing surface roughness in both media.
- Relative adhesion decrease in water was ~300% greater than in air for similar roughness changes.
- Adhesion in water showed complex velocity dependence with increasing roughness.
Conclusions:
- Surface roughness has a profound impact on adhesion, particularly in the presence of nanobubbles in water.
- Nanobubble-induced capillary effects in water lead to a more pronounced reduction in adhesion with roughness compared to air.
- The interplay between nanobubbles, roughness, and retraction velocity governs adhesion in aqueous environments.
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