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BP: Fachverband Biologische Physik

BP 34: Posters: New Technologies

BP 34.11: Poster

Donnerstag, 25. März 2010, 17:15–20:00, Poster B2

A hazzardfree fabrication process for arbitrarily shaped microparticles — •Lukas Bogunovic, Jan Regtmeier, and Dario Anselmetti — Experimental Biophysics and Applied Nanoscience, Physics Faculty, Bielefeld University, Bielefeld

The use of micro- and nanoparticles impacts applications in biotechnological, chemical and physical sciences like the manipulation and transport of objects in microenvironments or as model migrants in microfluidic systems [1,2]. However, most of the commercially available particles are spherical. Therefore their field of application with respect to shape dependent phenomena is strongly limited.
Here, we propose a novel simple and inexpensive method for the production of arbitrarily shaped microparticles with a manufacturing spreading better than 2.5%. Comparable methods essentially need hazardous acids like hydrofluoric acid (HF) or complicated processing setups which are therefore delicate to handle. Our process involves structuring of the particles in SU-8, which can be doped with tracers like magnetite or fluorescent dyes. Afterwards they are released from their substrate into a surfactant solution with a treatment in an ultrasonic bath.

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