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Mitigate Quantum Friction on Defective Multilayer Graphene.
Yunxie Huang1, Runkeng Liu1, Peilin Cui1
1School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
The Journal of Physical Chemistry Letters
|March 2, 2026
Summary
Atomic defects paradoxically increase classical friction but decrease quantum friction at interfaces. This finding impacts understanding fluid transport in nanofluidic devices and materials science.
Area of Science:
- Materials Science
- Nanotechnology
- Physical Chemistry
Background:
- Interfacial friction is critical for nanofluidic applications.
- Atomic defects traditionally increase friction, hindering fluid transport.
- The effect of defects on recently discovered quantum friction is unknown.
Purpose of the Study:
- Investigate the dual effect of atomic defects on classical and quantum friction at the graphene-water interface.
- Understand the mechanisms behind defect-induced friction changes.
Main Methods:
- Utilized molecular dynamics simulations.
- Employed a classical Drude oscillator model.
- Focused on the graphene-water interface.
Main Results:
- Atomic defects paradoxically increase classical friction by altering the interfacial free-energy landscape.
- Atomic defects suppress quantum friction by modifying the solid's electronic response.
- Reduced spectral overlap between solid charge fluctuations and water librational modes explains quantum friction suppression.
Conclusions:
- Atomic defects exhibit a dual role in interfacial friction.
- Understanding these effects is crucial for designing advanced nanofluidic systems.
- Defect engineering can be used to tune interfacial friction for specific applications.
