Measurement of Monomolecular Layers Using Specialized FTIR Grazing Angle Accessories

The analysis of monomolecular layers has traditionally been a challenging spectroscopic measurement due to the relatively low signal obtained from the sample. Specular reflectance at high “grazing” angles (around 80 degrees from normal to the surface) has been recognized as one of the best spectroscopic techniques to monitor monomolecular layers on reflective surfaces due to the enhancement of the infrared signal. This application note explains how the versatility of this sampling technique can be further optimized using different specialized grazing angle accessories.