ArticleScience advances2019
Fluorescence microscopy visualization of the roughness-induced transition between lubrication regimes.
Article in Science advances, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Frictional strength regulated by roughness alignment.Science advances · 2025Article
- Modelling Friction Reduction Based on Molybdenum Disulphide Tribofilm Formation and Removal in Boundary Lubrication.Tribology letters · 2025Article
- Non-monotonic Dynamics in the Onset of Frictional Slip.Tribology letters · 2022Article
- Fluorescent Liquid Tetrazines.Molecules (Basel, Switzerland) · 2021Article
- Lubricant film formation in rough surface non-conformal conjunctions subjected to GPa pressures and high slide-to-roll ratios.Scientific reports · 2020Article
- Ageing of Polymer Frictional Interfaces: The Role of Quantity and Quality of Contact.ACS applied materials & interfaces · 2020Article
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We investigate the transition between different regimes of lubrication and directly observe the thickness of nanometric lubrication films with a sensitivity of a single molecular layer at a multi-asperity interface through fluorescence microscopy. We redefine specific film thickness as the ratio of the lubricant film thickness and the surface roughness measured only at those regions of the interface where the gap is "minimal." This novel definition of specific film thickness successfully captures the transition from full elastohydrodynamic lubrication to mixed and boundary lubrication. The transition can be triggered by increasing the surface roughness and is accurately predicted by using the new film thickness definition. We find that when the liquid carries part of the load, its apparent viscosity is greatly increased by confinement, and show how the transition between different lubrication regimes is well described by the viscosity increase and subsequent glass transition in the film.
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Registered trials
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