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Communication Dans Un Congrès Année : 2023

Understanding the role of surface oxidation on wettability of laser textured surfaces

Ilemona S Omeje
Tatiana Itina

Résumé

In addition to controlling surface wettability, femtosecond laser surface texturing of materials by direct laser ablation has a wide range of applications, specifically for virus and bacterial repulsion. However, because of chemical surface alterations such as oxidation and/or molecule adsorption, the wettability of laser-textured surfaces alternates over time [1–2]. The reasons for this effect are not yet properly understood, despite their significance. To further understand these effects, we have developed a multiscale model, in which reactive molecular dynamics (RMD) is used to simulate chemical surface alterations while computational fluid dynamics (CFD) is used to quantify droplet behavior on laser-textured metal surfaces [3]. In particular, surface oxidation and molecule adsorption at the interface of a femtosecond laser were simulated using RMD. The obtained reaction rates are then utilized to modify a number of the CFD model's interface settings. The simulation's results demonstrate how the amount of surface-attached oxygen influences the evolution of water droplets.
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Dates et versions

ujm-04249888 , version 1 (19-10-2023)

Identifiants

  • HAL Id : ujm-04249888 , version 1

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Ilemona S Omeje, Tatiana Itina. Understanding the role of surface oxidation on wettability of laser textured surfaces. MANUTECH SLEIGHT SCIENCE EVENT#9, MANUTECH SLEIGHT GRADUATE SCHOOL, Jan 2023, SAINT ETIENNE, France. ⟨ujm-04249888⟩
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