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(A) 1-D USAXS scattering profiles during the emulsification of perfluorooctane (PFO) at increasing acoustic pressures and corresponding (B) distributions resulting from each acoustic pressure. In general, as the acoustic pressure increased, average droplet size decreased and monodispersity improved. However, beyond the cavitation threshold (6.2 MPa, panel (C)), the average droplet size decreased from approximately 60 nm to radius to 20nm to radius.
