ArticleThe journal of physical chemistry letters2022
Local Shearing Force Measurement during Frictional Sliding Using Fluorogenic Mechanophores.
Article in The journal of physical chemistry letters, 2022. 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.
- Formation and compaction of sub-10 nm transfer films in metal-ceramic fretting.Beilstein journal of nanotechnology · 2026Article
- Mechanistically Different Mechanochromophores Enable Calibration and Validation of Molecular Forces in Glassy Polymers and Elastomeric Networks.Angewandte Chemie (International ed. in English) · 2024Article
- Molecular Probing of the Microscopic Pressure at Contact Interfaces.Journal of the American Chemical Society · 2024Article
- Chemistry and light: an adventure into probing, understanding and controlling events at the molecular scale.Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology · 2024Article
- Super-resolution Fluorescence Imaging of Recycled Polymer Blends via Hydrogen Bond-Assisted Adsorption of a Nile Red Derivative.Langmuir : the ACS journal of surfaces and colloids · 2023Article
- Molecular Probing of the Stress Activation Volume in Vapor Phase Lubricated Friction.ACS applied materials & interfaces · 2023Article
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Authors and funding
6 authors.
Funding
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Abstract
When two macroscopic objects touch, the real contact typically consists of multiple surface asperities that are deformed under the pressure that holds the objects together. Application of a shear force makes the objects slide along each other, breaking the initial contacts. To investigate how the microscopic shear force at the asperity level evolves during the transition from static to dynamic friction, we apply a fluorogenic mechanophore to visualize and quantify the local interfacial shear force. When a contact is broken, the shear force is released and the molecules return to their dark state, allowing us to dynamically observe the evolution of the shear force at the sliding contacts. We find that the macroscopic coefficient of friction describes the microscopic friction well, and that slip propagates from the edge toward the center of the macroscopic contact area before sliding occurs. This allows for a local understanding of how surfaces start to slide.
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Registered trials
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