Abstract
The changes in droplet geometry associated with volume change are experimentally investigated focusing on low surface energy solids. In particular, two experiments are performed to confirm the detailed droplet behavior such as the changes in height, radius, and contact angle, on a solid surface for a range of liquid surface energies. The first experiment involves the natural evaporation of droplets; droplet sizes from micrometer to millimeter are investigated. The second involves simply depositing droplets on a solid surface, then withdrawing liquid using a microsyringe. In this experiment, volume change is quantitatively evaluated. Our experimental results reveal details of the variations in droplet geometry among droplet radius, height, contact angle, and surface energy of the liquid.
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