Regensburg 2007 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 7: POSTER: INTERNAL SYMPOSIUM Scattering Experiments

CPP 7.14: Poster

Montag, 26. März 2007, 16:00–18:00, Poster B

Polymer coated micro mechanical cantilever arrays — •Sebastian K. Nett^{1, 2}, Gunnar Kircher¹, and Jochen S. Gutmann^{1, 2} — ¹Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128 Mainz, Germany — ²Institute for Physical Chemistry, Johannes Gutenberg University, Jakob-Welder-Weg 10, D-55099 Mainz

Functional layers can turn micro mechanical sensors consisting of an array of eight cantilevers into specific sensing systems for chemical or biological applications. We showed before that tethered polymers are robust and sensitive for analytes. To access individual cantilevers inkjet printing is a versatile approach. Using the automatic pipetting system, Nano-Plotter^TM (GeSiM) the solution for tethering is applied contact less in small droplets directly onto the cantilever. Small droplets tend to evaporate in a few seconds. On the other hand anchoring the molecules to the surface need some time due to kinetic and diffusion processes. Therefore room temperature Ionic Liquids which have a negligible vapour pressure are incorporated in the coating step.
The small geometry of the cantilever (500 to 1000 µm length, 90 µm width, 1 to 5 µm of thickness) rises problems with the standard techniques for characterising the functional layer. To overcome these characterization problems, we used the µ-focus option at the GISAXS Line BW4 at the HASYLAB in Hamburg for detailed studies.