Abstract: A nebulizer (10) comprising a housing which defines, a chamber that has an outlet to the chamber for the egress of atomised fluid particles from within the chamber. The nebulizer (10) further including solid substrate (11) within the chamber of the housing. A linear channel (12) being formed in the substrate (11) that has a closed base, opposite side walls and an opening that opens through an upper surface of the substrate (11). A vibration generator (17) being attached to the substrate (11) at a position spaced from the channel (12) for generating high frequency vibration that transmits through the substrate (11) to the channel (12) to atomise fluid within the channel (12). A feeding facility (15) being provided for feeding fluid to the channel (12).

Abstract: A microfluidic device for separating or sorting particles in a fluid including: a substrate; a plurality of interdigital transducers on the substrate; a microfluidic channel adapted to have fluid flow within, located over the interdigital transducers, the microfluidic channel having a width, wherein: the interdigital transducers are located within the width of the microfluidic channel; and application of a signal to the interdigital transducers produces a force field at an angle to the fluid flow direction within the microfluidic channel.