Impact dynamics of nanoparticle laden droplets on glass surfaces

Impact of nanoparticle laden droplets is crucial in spray and printing industries. In this paper, we have experimentally investigated the impact dynamics of nanoalumina laden droplets upon glass surfaces. We provide a comprehensive understanding of the outcomes of the impact of such droplets by varying the impact velocity and the particle concentration in the droplets. The entire process is delineated into different stages and the governing parameters are identified. We also emphasize the morphology of the final structures formed at the end of the droplet lifetime. Various types of morphologies from a typical ring-type deposit to a unique mountain-type deposit can be achieved by manipulating the impact velocity and the initial particle concentration. The results of the current work have significant potential for various applications such as nanoprinting and drug coating.