Interfacial properties, surface acoustic

Surface and Interfacial Properties of Surface Acoustic Wave Gas Sensors... 

More recently, Yang and Thompson implemented this type of sensor in FI manifolds, which they consider ideal environments for relating the sensor s hydrodynamic response to the analyte s concentration-time profile produced by the dispersion behaviour of sample zones. Network analysis of the sensor generates multi-dimensional information on the bulk properties of the liquid sample and surface properties at the liquid/solid interface. The relationship between acoustic energy transmission and the interfacial structure, viscosity, density and dielectric constant of the analyte have been thoroughly studied by using this type of assembly [171]. 

This type of sensor operates by observing the propagation of an acoustic wave through the solid-state device. Sensing is achieved by correlating acoustic wave-propagation variations to the amount of analyte captured at the surface and then to the amount or concentration of analyte present in the sample exposed to the sensor, or to the changes in physical properties of interfacial thin films. 

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