Size distribution of nanoparticles in the droplets ultrasonically atomized from Al2O3 suspension

In this study, a recollection method only for particles below a certain size involving ultrasonic atomization was suggested. Nanoparticles were separately recollected by using the suggested method with the suspension made of alumina powder of 300 nm center diameter and the particle distributions in the recollected suspension were observed using an optical microscope. Furthermore, the size distribution of the recollected particles depending on the surface tension of the suspension was investigated. Results indicate that the sizes of the particles in the recollected suspension were reduced by decreasing the surface tension of the suspension. In the suggested method, the maximum diameter of the recollected nanoparticles could be controlled by changing the surface tension of the suspension.