Dresden 2009 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 34: Microfluidics I: Applications and Devices
CPP 34.1: Vortrag
Donnerstag, 26. März 2009, 09:30–09:45, ZEU 160
Ship-in-a-Bottle Assembly of Linked Geometrically Coupled Microdevices — •Tobias Sawetzki1, Sabri Rahmouni1, David W.M. Marr2, and Clemens Bechinger1,3 — 12. Physikalisches Institut, Universität Stuttgart — 2Chemical Engineering Department, Colorado School of Mines, Golden — 3Max-Planck-Institut für Metallforschung, Stuttgart
To realize complex microfluidic systems the ability to drive and control the single components in an integrated and cooperative fashion is required. In current mircofluidic chips the actuation and manipulation of individual units is often done on a single-device level by applying macroscopic methods such as external pressure. The need for connections to the macroscopic world for every single device on the chip hinders both, the portability and the development of highly complex architectures on Lab-on-a-Chip systems. We present a new method [1] to build, actuate and control microfluidic systems with only one external source of power. Magnetic fields are not only used to in-situ assemble paramagnetic colloidal particles in confining geometries, but also to power the components non-invasively and massively parallel. By combining local geometry of channel architecture with this single global field, the functionality of a constituent device is only defined by the shape of colloidal cluster and surrounding. Applying this method, we present a full set of basic microfluidic components like pumps, valves and mixers, and demonstrate that more complex operations can be performed by linking individual units together.
[1] Sawetzki et al. PNAS, Dec. 08