Surface Tension Measurements of Organic Gas-Exposed Hanging Droplet Aerosol Mimics

Proof-of-concept measurements have indicated that the surface tension of a suspended water droplet will shift when in the presence of evaporated organic compounds in the air surrounding it, with shifts that would be greater than expected of the relatively small amounts of gas that are being transferred into the droplets. This study aims to take a more systematic approach to this phenomenon by exposing hanging droplets of water and ammonium sulfate solution to ethanol and acetone, which are both known to easily dissolve in water and can affect solution surfaces.