(UHV-RAIRS) ultrahigh vacuum reflection-absorption infrared spectroscopy permits vibrational spectroscopic studies at grazing incidence on adsorbed molecules on well-defined solid surfaces.
In UHV-RAIRS, the optical path is entirely evacuated to avoid background signals from gas phase species and results in a superior sensitivity and stability of the system. Essential prerequisites for monitoring molecular species adsorbed, e.g., on oxide single-crystal surfaces are wide pressure (UHV to ambient conditions) and temperature ranges (1000-100 K).
IR - IR Beamline @ Swiss Light Source Synchrotron
IR spectroscopy is mainly used to investigate the chemical composition of samples, the technique is easy-to-use, non-destructive, and is useful in astronomy, biology, chemistry, and forensic sciences, for example; IR spectroscopy is used as well to investigate low energy excitations in the condensed phase