Abstract
We report new developments in understanding and utilizing acoustofluidics, including atomization devices and physics, interesting new phenomena observed in nanochannels, and entirely new directions of research. In our atomization effort, we have found an absence of bulk turbulence previously posited responsible for capillary wave phenomena that give rise to atomization and find a complex combination of caustics and nonlinear interfacial deformation to be responsible instead. These phenomena are observed on our completely portable micro-scale atomizer devices potentially useful in pulmonary applications. In extending our previous efforts in nanoslit acoustofluidics, we examine droplet manipulation in two-dimensional nanochannel arrays and observe transport at up to 0.1 m/s. Finally, we describe methods and the underpinning physics to integrate acoustofluidics into energy storage systems for a step change in their performance.
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