2.3. Fourier Transform Infrared Spectroscopy (FTIR)
A Nicolet 470 spectrophotometer (Thermo Fisher Scientific, MA) equipped with a Mercury Cadmium Telluride (MCT) detector was used to collect FT-IR spectra with a resolution of 4cm-1, and 128 scans. Samples were deposited directly in the Attenuated Total Reflectance (ATR) crystal covering the surface with a thin film. Duplicate absorbance mode spectra were recorded from 4000-800cm-1 and processed with OmnicTM software.