Book title: Piezoelectric Sensors
Editors: Steinem C, Janshoff A
Series title: Springer Series on Chemical Sensors and Biosensors
Series editors: Wolfbeis O
Abstract: Mass-sensitive devices such as the quartz crystal microbalance (QCM) or the surface acoustic wave device (SAW) are very advantageous for chemical sensing. As their name implies, they react towards mass changes on their respective sensitive areas, which makes them almost universally applicable since every analyte has a mass. Detection limits can be as low as 1 ng for QCM and in the picogram range for SAW. Of course, selectivity also has to be introduced into the sensor system. For this purpose molecular imprinting, where the sensitive layer is generated by polymerising it directly on the respective device surface, is gaining increasing attention. A reason for this is the very straightforward synthetic approach, where the analyte-to-be is used as a template that determines the structure of the interaction sites within the polymer by self-organisation processes. In this chapter, we give an introduction into the electronic background of mass-sensitive devices as well as into molecular imprinting. In the second half, we will introduce selected strategies for actual chemical sensing of analytes covering a size range from molecular to micrometre as well as both pure compounds and mixtures.
Template and target information: Review - MIPs and mass-sensitive sensors
Author keywords: mass-sensitive transducer, QCM, SAW, molecular imprinting