Supercooled Water We have demonstrated that a theoretical model based on the presumed existence of a liquid–liquid critical point (LLCP) in water in the deeply supercooled region is capable of representing, accurately and consistently, all available experimental thermodynamic property data for supercooled ordinary and heavy water. Self-Assembly of Small Molecules in Aqueous Solutions By using experimental techniques such as static and dynamic light scattering and optical confocal microscopy, we are investigating the nature of mesoscopic heterogeneities of certain aqueous solution. Study of "Smooth" Interfaces We are also studying the effect of fluctuations on the behavior of smooth (or "fuzzy") interfaces. The examples include near-critical vapor-liquid and liquid-liquid interfaces in simple and complex fluids, interfaces in polymer solutions and polymer blends, liquid membranes and vesicles. A broader impact of this research includes filtration through microporous media in oil recovery, microfluidics, nanoscale liquid bridges, and nucleation phenomena: wherever science and technology deal with fluid droplets at submicron and nano scales.