A2.2 - SAWs for Chemical Sensing - Optimizing Receptor Layers and Transducers in Respect to Analytes of Interest

F. L. Dickert & P. A. Lieberzeit
Mass sensitive detection is the most universal strategy to combine sensitive layers with transducer principles. Coating SAWs with rigid materials will increase the resonance frequency due to mass load in a quadratic manner. The SAW resonance frequency can be enhanced up to approximately two GHz leading to superior applications. Well known piezoelectrical materials are quartz and lithiumtantalate. Gas phase measurements can be performed with quartz devices in typical resonance frequencies from 430 MHz to 1...