FIG. 1.
(a) Schematic depiction of the microfabricated SAW device. Power in the form of an oscillating electrical signal is supplied to the IDT electrode photolithographically patterned onto a single crystal piezoelectric (lithium niobate; LiNbO3) substrate. This causes the generation of the SAW, whose propagation causes liquid containing the antibodies to be drawn from the vial through a capillary tube and paper wick in contact with the substrate. (b) Above a threshold power, the liquid meniscus, which forms as a consequence, is destabilized and nebulized into a fine aerosol mist suitable for inhalation. The scale bar denotes a length of approximately 1 cm.