Piezoelectric biosensors are analytical devices that utilize the piezoelectric effect to detect biological molecules. The piezoelectric effect refers to the ability of certain materials to generate an electric charge in response to applied mechanical stress. These biosensors typically include a piezoelectric crystal that resonates at a specific frequency. When a target molecule, such as a cancer biomarker, binds to the sensor surface, it induces a change in the resonance frequency, which can be measured and correlated to the concentration of the target molecule.
