Acoustowetting: Microscale and Nanoscale Liquid Manipulation for Microfluidic Applications

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The ability to control the spreading of liquids on surfaces is crucial to the design of portable diagnostic microdevices. Combining advanced flow visualisation together with analytical and numerical techniques, this project will elucidate a recently discovered ‘acoustowetting’ phenomenon in which micron thick liquid films can be manipulated using sound waves localised on a substrate. The phenomenon is dynamically rich and complex, exhibiting peculiarities that are at times analogous to other spreading processes and at other times quite unique: flow reversal, fingering instabilities and soliton-like wave trains. The research will subsequently utilise this fundamental understanding to design a system for encapsulating cells in droplets for drug delivery applications.