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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 19: POSTER: Micro and Nano Fluidics

CPP 19.9: Poster

Mittwoch, 28. März 2007, 16:00–18:30, Poster B

Shear flow pumping in open microfluidic systems — •Markus Rauscher^1,2, Siegfried Dietrich^1,2, and Joel Koplik³ — ¹Max-Planck-Institut für Metallforschung, Heisenbergstr. 3, 70569 Stuttgart — ²Institut für Theoretische und Angewandte Physik, Universität Stuttgart, 70569 Stuttgart — ³Benjamin Levich Institute and Department of Physics, City College of the City University of New York, New York, NY 10031, USA

We propose to drive open microfluidic systems by shear in a covering fluid layer, e.g., oil covering water-filled chemical channels. The advantages as compared to other means of pumping are simpler forcing and prevention of evaporation of volatile components. We calculate the expected throughput for straight channels and show that devices can be built with off-the-shelf technology. Molecular dynamics simulations suggest that this concept is scalable down to the nanoscale.