Dresden 2006 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 24: POSTER Microfluidics

CPP 24.15: Poster

Thursday, March 30, 2006, 17:00–19:00, P2

Integrated peristaltic pumps tailored for new migration phenomena — •Stefan Gerkens, Dario Anselmetti, and Alexandra Ros — Experimental Biophysics & Applied Nanosciences, Bielefeld University, Department of Physics, Universitaetsstrasse 25, 33615 Bielefeld, Germany

Peristaltic pumps based on PDMS can be used as fluidic driving-mechanism for a fully-integrated lab-on-a-chip evading difficulties involved with electrokinetic approaches. The characteristica of such a device are well suited for a large variety of microfluidic applications, for example the transport of biological compounds or colloidal particles. The fabrication is possible by soft lithography requiring only two PDMS moulds. External control is performed by an array of digitally assessable microvalves providing the necessary pressure for actuation. Both the lithography process (e.g. channel geometry) and the parameters controlling the external microvalves (e.g. actuation pressure and valve sequence) yield a large possibility to optimize the micropump for different problems. In this contribution, the application of a fully PDMS based peristaltic pump for the driving of colloidal particles in microfluidic networks is presented. Characterisation of this setup will be carried out in terms of flow rates, periodic driving amplitudes and single pumping-cycle analysis. This microfluidic pump will be used for the development of new migration phenomena in tailored microfluidic devices.