Structure and organization at liquid interfaces - Our studies of polarity across liquid/liquid interfaces raise questions about how molecules having different structures organize themselves when constrained to two dimensions. Irregularly shaped, organic molecules are ubiquitous throughout biology, chemistry and environmental science, yet very little is known about how these species assemble spontaneously to form organic films at aqueous interfaces. To answer these questions, we use vibrational sum frequency spectroscopy (VSFS) to acquire vibrational spectra of species adsorbed to the aqueous-vapor interface. These data coupled with careful surface pressure measurements provide the quantitative information needed to model the competing forces that control surfactant concentration and conformation at air/aqueous interfaces.



Physical, Spectroscopy