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BP: Fachverband Biologische Physik

BP 12: Posters: New Technologies

BP 12.6: Poster

Montag, 14. März 2011, 17:15–20:00, P3

Microwave high-K based sensors for the analysis of liquids and molecules — •Eugen Hollmann, Roger Wördenweber, Thomas Grellmann, Kyrylo Greben, and Rolf Kutzner — Institute of Bio- and Nanosystems (IBN), Forschungszentrum Juelich, 52425

The aim of this work is the developement of microwave devises suitable for detection and alalysis of the properties of organic and biological solutions via microwave technology. Dielectric spectroscopy of liquids and molecules in liquid environment provides information about the mobility of molecules by probing its complex dielectric properties. The design of sensors is based on a number of thin film stripline topologies on different microwave suitable substrates (e.g., sapphire, LaAlO3)using high-k material for improvement of the devise sensitivity. Test measurements in a frequency regime up to 20GHz reveal the high resolution of this technology. Finally, it is demonstrated that the relaxation properties of water and aqueous solutions, alcohols and mixtures of alcohols with dipolar and non-polar solvents can be analyzed via these devices.