Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Micro- and Nanofluidics II
CPP 46.8: Vortrag
Freitag, 18. März 2011, 12:30–12:45, ZEU 222
(contribution withdrawn) On the dissipation and oscillatory solvation forces in confined liquids — •Sissi de Beer1, Wouter den Otter2, Dirk van den Ende1, Wim Briels2, and Frieder Mugele1 — 1Physics of Complex Fluids, Twente University, Enschede, the Netherlands — 2Computational BioPhysics, Twente University, Enschede, the Netherlands
Usually, a fluid is considered as a continuum medium characterized by a well-known density and viscosity. Upon miniaturization of (nano-) fluidic systems down to a height of only a few nanometer, however, the discrete molecular structure becomes visible and the liquid behaves completely different from the bulk. We study the dissipation in confined liquids and show via Atomic Force Microscope measurements and Molecular Dynamics simulations that the dissipation depends highly on the structure of the liquid molecules. When a discrete amount of molecular layers fit between the two confining surfaces the molecules are maximally organized and we find a minimum in the dissipation, while in between the dissipation significantly increases.