Fig. 19. (a) Microscopic image of a microfluidic flow focusing geometry with a 3D expansion, illustrating the atomization-like production of microbubbles, and fine-spray production of nanoparticles. (b) Histogram depicting an optically counted concentration distribution of particles, reported by Peyman et al. The optical limit of 0.75 μm is reached within the green shaded region.148.
