(596b) “Effective” Negative Surface Tension: A Property Of Coated Nanoaerosols

Atmospheric aerosols play a very important role in atmospheric processes and have a major influence on the global climate. In this paper, we report results of a Molecular Dynamics study on the unique properties of organic coated water droplets. In particular we find that for particles preferring an inverted micelle structure, the lower chain-chain interaction, with increasing radial distance from the water-organic interface, results in a negative internal radial pressure profile for the organic layer. As a result, a coated particle behaves as though the surface tension is ?negative?, and implies that such a particle will inherently have an inverse Kelvin vapour pressure effect, resulting in increased water condensation.