On Earth, the condensing substance is water vapor, which forms small droplets of water or ice crystals, typically 0.01 mm in diameter. (sciencedaily.com)
During atomization the fuel still remains in liquid form, it's just broken up into small droplets consisting of multiple fuel molecules. (mechanics.stackexchange.com)
The metals are melted together to form small droplets of liquid solutions at the high temperatures, which are then rapidly cooled to form homogeneous nanoparticles. (sciencedaily.com)