<p>A device for generating a nebulized sample for detection of an analyte. The device includes a surface acoustic wave (SAW) transducer and a superstrate. The superstrate has a first surface for coupling with the SAW transducer and a second surface for receiving a fluid sample incorporating the analyte. The fluid sample is nebulized from the second surface. The superstrate is provided with an electrical connection extending from the second surface of the superstrate to provide a conducting path from a charge source to the second surface of the superstrate. The charge source may be the surface of the transducer or an external voltage source.</p>
