IRAAS + Langmuir Trough

The Infrared Reflectance Absorbance Spectrophotometer (IRRAS) coupled with the Langmuir Trough (LT) and Brewster Angle Microscope (BAM) are surface sensitive techniques that provide information on stability, structure, and orientation of surface-active molecular species at the air-water interface. The IRRAS uses an infrared spectrometer (Bruker Tensor 37) that shines an IR beam onto the aqueous solution in the LT using a gold mirror. The reflected beam is then collected by another gold mirror and is sent to the detector (Infrared Associates Inc., mid-band with a ZnSe window). The LT (KSV NIMA LB, S/N AAAA100505) measures the behavior and interactions of molecules at the air-water interface at different surface pressures through compression, enabling the precise control and study of monolayers formed on the surface. Using the LT with the BAM (KSV NIMA, MicroBAM) can determine surface heterogeneity and surface film formation during the compression.