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DY: Fachverband Dynamik und Statistische Physik

DY 16: Droplets, Wetting, and Microfluidics (joint session DY/CPP)

DY 16.7: Vortrag

Montag, 9. März 2026, 16:30–16:45, ZEU/0118

Stretching and Sliding Capillary Bridges — •Lennard Holschuh and Lars Pastewka — University of Freiburg, Department of Microsystems Engineering

Capillary forces play a critical role in the adhesion between two contacting bodies. However, existing theories of macroscopic adhesion on rough surfaces often assume dry conditions, attributing adhesive interactions solely to dispersion forces and overlooking the effects of capillary bridge formation. This study employs molecular dynamics simulations to directly examine the interactions of nanoscale probes with nominally flat surfaces in the presence of liquid bridges, which form due to condensation in humid environments. The objective is to link the thermodynamic understanding of capillary bridges with molecular simulations and atomic-force microscopy experiments. These calculations focus on investigating energy dissipation during adhesion (normal separation of the probe from the surface) and friction (lateral motion of the probe). By quantifying the interplay between relative humidity, adhesion, and friction, this work aims to improve the understanding of macroscopic adhesion in humid conditions and guide the development of materials with tailored properties for high-precision applications, such as microelectronic manufacturing.

Keywords: Capillary Bridge; Molecular Dynamics; Adhesion; Friction; Nanoscale