Berlin 2015 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 23: Reaction-Diffusion Systems
DY 23.3: Vortrag
Dienstag, 17. März 2015, 15:00–15:15, BH-N 243
Kinetics of a chemical clock reaction in a microflow — •Robert Raimund Niedl1, Alexander Anielski1, Igal Berenstein2, and Carsten Beta1 — 1Biological Physics, Universität Potsdam, Germany — 2Nonlinear Physical Chemistry Unit,Université libre de Bruxelles, Brussels
We study the dynamics of the autocatalytic iodate-arsenite reaction in PDMS-based microfluidic devices under continuous flow conditions. If a critical amount of initializer is present, a color reaction is triggered by a nonlinear autocatalytic process. We investigate the kinetics of the clock depending on the various input concentrations and in different channel geometries. We could show that due to delayed mixing in the microchannel, higher local initiator concentrations occur, so that the reaction runs up to seven times faster, than in a macroscopic well-mixed volume.