Evaporation induces a Marangoni flow inside a droplet. Equilibrium vapor pressure depends on droplet size. This is done by spraying colloids on average containing only one particle per droplet. Cloud condensation nuclei are necessary for water droplet formation. The vapor from the droplet convects and diffuses away from the droplet surface. This results in a controlled, variable electrostatic charge on each droplet. A photograph of the same droplet on the untreated surface is shown in Fig. Exposure to these constituents reduces the ability of the dust to trigger water droplet formation. Heat conducts radially against the convection toward the droplet interface. With the reduction in droplet size came new experimental observations of wetting. This mechanism has also been used in droplet-based microfluidics for droplet manipulation. A Slime is a small blue blob, shaped like a water droplet, with a face. They usually contain a single, large refractive oil droplet. Water droplet size is crucial for sustaining aeroponic growth. The distribution has an upper limit due to droplet fragmentation.