Self-exciting, self-sensing piezoelectric cantilever sensors for airborne analyte is detected directly in the air

摘要

Method using the piezoelectric cantilever sensor comprising for detecting aeroplankton histological agent, the piezoelectric layer and the non-piezoelectric layer. I be placed in one or both of the two layers of the identification entity. It can be fixed chemically to the cantilever sensor surface, antibodies that recognize and bind to airborne species. In one embodiment, the cantilever sensor, only one end is attached to the base. In other embodiments, includes a second base and a first one is attached to each of the second base and the first sensor to form the piezoelectric cantilever beam sensor at least the piezoelectric layer and the non-piezoelectric layer. In this embodiment, through the stress of the piezoelectric layer, to measure the resonance; at relatively low concentrations, is detected with sufficient sensitivity, sensing excellent airborne species in the gaseous medium in such a sensor and is robust It shows the characteristics have been shown.