Regensburg 2007 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 25: Micro and Nano Fluidics III: Lab-on-Chip Geometries
CPP 25.3: Vortrag
Donnerstag, 29. März 2007, 18:00–18:15, H37
Mesoscopic modeling of microfluidic colloidal devices — •Arthur Straube1 and Ard Louis2 — 1Department of Physics, University of Potsdam, Am Neuen Palais 10, PF 601553, D-14415 Potsdam, Germany — 2Rudolph Peierls Centre for Theoretical Physics, Oxford University, 1, Keble Road, Oxford, OX1 3NP, UK
We address the problem of microfluidic colloidal devices and focus on a peristaltic micropump and a colloidal valve, which have recently been implemented experimentally [1]. To model these microfluidic systems, we apply the method of stochastic rotation dynamics, where the motion of colloids is assumed to be imposed through the use of optical traps. We investigate the efficiency of the devices and are particularly interested in the effects of Brownian motion of the colloids. Here, we aim at answering a fundamental question of how small such a device can be made before it stops functioning.
The research is funded by DFG Priority Program SPP 1164 "Nano- and microfluidics," (project STR1021/1-1) and partially supported by HPC-EUROPA Visitor program (RII3-CT-2003-506079).
[1]. A. Terray, J. Oakey, D.W.M. Marr, Microfluidic control using colloidal devices, Science 296, 1841 (2002).