2006 | OriginalPaper | Chapter
Imaging surfactant concentration distributions at the air/water interface
Part 2: Insoluble monolayer concentrations on standing capillary waves
Authors: Gerald M. Korenowski, John R. Saylor, Elizabeth A. van Wagenen, Joseph S. Kelley, Mark E. Anderson, Elizabeth J. Edwards
Publisher: Springer Berlin Heidelberg
Surfactant concentrations at the peaks and troughs of a standing capillary wave field were measured using a reflected second harmonic generation (SHG) imaging technique. The results revealed behaviour that is consistent with a compaction of the insoluble monolayer at the crests of the capillary waves and a dilation of the monolayer in the troughs. Each measurement was obtained using a single 3 nanosecond laser pulse, providing essentially instantaneous measurements of surfactant concentrations.