Abstract
The wetting behavior of micro-droplets (distilled water and lubrication oil) on natural mica and silicon nitride (Si3N4) surfaces was observed and evaluated using an atomic force microscope (AFM). The wetting contact angle changes with droplet size, which is discussed.
Micro-droplets of water and oil were successfully observed with the AC non-contact mode of the AFM. The micro-droplets of oil were applied to mica and Si3N4 surfaces by the cantilever of the AFM. The wetting evaluation showed that wetting contact angles for micro-droplets on mica and Si3N4 surfaces were lower than those of macro-ones, and the values were lower for smaller micro-droplets.
