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Fourier Transform Infrared (FT-IR) Spectroscopy

Infrared (IR) spectroscopy detects the vibration characteristics of chemical functional groups in a sample. An infrared spectrum represents a fingerprint of a sample with absorption bands which correspond to the frequencies of vibrations between the bonds of the atoms in the material. We have a number of IR spectrometers and accessories which are use a variety of purposes and samples.

Infrared reflection-absorption spectroscopy (IRAS, IRRAS, or RAIRS) is an IR technique often used for the investigation of ultrathin organic films on metal substrates. Information about the molecular orientation, chemical composition, coverage, molecular packing and their intermolecular interactions in the monolayer can be extracted from the obtained reflection-absorption (RA) spectra.

Our RA spectra are recorded employing a Bruker IFS66 FT-IR spectrometer, equipped with a grazing angle of incidence reflection accessory aligned at 85o, and a wire grid polarizer (p-polarized). A liquid nitrogen cooled mercury cadmium telluride (MCT) detector is used.

We also have two Bruker Vertex 70 spectrometers with a wide range of accessories for ATR, variable-angle external reflectance, PM-IRAS, in situ electrochemical cells, transmission sample changers, etc.

This is our PM-IRAS instrument!

Contact: Thomas Ederth (ted@ifm.liu.se)

Responsible for this page: Erik Martinsson
Last updated: 11/18/13