Dresden 2009 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: POSTERS Magnetic Soft Matter

CPP 12.6: Poster

Dienstag, 24. März 2009, 14:00–16:30, P3

COLLOIDAL MICROMOTORS — •Larysa Baraban, Christian Kreidler, Denys Makarov, Paul Leiderer, and Artur Erbe — Department of Physics, University of Konstanz, Universitätstrasse 10, Konstanz, D-78457, Germany

The interest in investigations of colloidal systems has been growing during the last years. This is mainly related to the flexibility of properties of the colloidal particles which allows their usage in life science, for instance, as drug delivery vehicles. Here we demonstrate that the system of magnetic capped colloids is the appropriate tool to realize the concept of the synthetic nano- and micro-engines. A long -range controlled movement of capped colloids, which is induced by a local catalytic reaction, is demonstrated. The application of a weak homogeneous magnetic field blocks processes of rotational diffusion, causing random changes of the direction of the driving force; it thus allows achieving directed motion of the particle on long scales. Therefore, these fully controlled artificial motors can be further developed to be used, for example, for the targeted delivery of micro-objects to the relevant places.

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