Abstract

Piezoelectric sensors have been developed based on very established theories in electricity, mass, and viscoelasticity and with commercially available instruments such as quartz crystal microbalance. Piezoelectric sensors have shown their advantages over other sensors in terms of sensitivity, versatility, label free, low cost, and simplicity. They have been applied to the biomedical area mainly in the forms of immunosensors and genosensors for rapid detection of bacteria, viruses and proteins, and DNA/RNA hybridization, respectively. However, the detection limit and reusable electrodes of piezoelectric sensors need to be improved for more applications in biomedical analyses.