Regensburg 2010 – scientific programme

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BP: Fachverband Biologische Physik

BP 34: Posters: New Technologies

BP 34.9: Poster

Thursday, March 25, 2010, 17:15–20:00, Poster B2

Single nanoparticle detection and the use of holographic optical tweezers for object manipulation in micro-fluidic devices — Julia S. Gebauer and •Lennart Treuel — Universität Duisburg-Essen, Essen, Germany

A Single NanoParticle Sensor (SNPS) has been developed on the basis of a modified optical tweezers approach and is used to count single NPs in micro-channels with high time resolution. The direction of a particle passing through the focus point can be determined by a suitable signal evaluation.

Laser pumps generated by optical tweezers can be used to establish controlled flow conditions in micro-fluidic devices. The flows generated by this approach are used to purposefully pump nano- and micro-objects in selected directions. The utilisation and characterisation of these micro pumps will be presented in this work. The combination of the ability to selectively pump nano- and micro objects with the single nanoparticle counter described above is expected to strongly enhance the use optical tweezers and their derivatives in new Lab-on-a-chip developments.