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Control of Cell Adhesion using Hydrogel Patterning Techniques for Applications in Traction Force Microscopy
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Interface Stabilization in Adhesion Caused by Elastohydrodynamic Deformation.
Preetika Karnal1,2, Yumo Wang3, Anushka Jha1
1Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA.
Physical Review Letters
|October 13, 2023
Summary
Detaching soft adhesives from soft probes prevents common interfacial instabilities during adhesion tests. This stabilization occurs due to the probe
Area of Science:
- Adhesion science
- Polymer physics
- Soft matter physics
Background:
- Interfacial instabilities are frequently observed in adhesion measurements, particularly with viscoelastic materials.
- Standard probe-tack tests often use rigid probes, which may not represent real-world applications involving soft surfaces like skin.
- Understanding debonding mechanisms is crucial for designing effective adhesives, especially in biomedical contexts.
Purpose of the Study:
- To investigate the effect of soft probe detachment on the debonding mechanism of viscoelastic polymer films.
- To determine if using soft probes can suppress interfacial instabilities like the Saffman-Taylor instability.
- To elucidate the underlying mechanism responsible for interface stabilization during soft probe detachment.
Main Methods:
- Utilized a model viscoelastic polymer film for adhesion measurements.
- Employed soft probes for the detachment experiments, contrasting with traditional rigid probes.
- Analyzed the debonding process to identify and characterize interfacial phenomena.
Main Results:
- Detachment from a soft probe was shown to suppress Saffman-Taylor instabilities.
- The study identified elastohydrodynamic deformation of the soft probe as the mechanism for interface stabilization.
- A scaling relationship for the onset of this stabilization was proposed.
Conclusions:
- Soft probe detachment offers a method to control and stabilize interfaces during adhesion measurements.
- Elastohydrodynamic effects play a key role in preventing instabilities in soft adhesive systems.
- Findings have implications for adhesive design in applications involving soft surfaces, such as medical devices.
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