IR spectroscopy
UHV reflection-absorption IR spectroscopy

Characterisation Installation 5
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(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).

          provided at NFFA-Europe laboratories by:
          provided at Large Scale Facilities by:

Ultra-high vacuum-reflection absorption IR spectroscopy (UHV-RAIRS) @ DESY NanoLab

Vibrational spectroscopic study at grazing incidence on well-defined solid surfaces. The unique feature of the IR apparatus is the entirely evacuated optical path to avoid background signals from gas phase species

Bruker, VERTEX 80v

~ 900 cm-1 - 5 cm-1

External MCT detector for RAIRS measurements on well-ordered solid surfaces

Internal DTG detector for Fourier-transform IR spectroscopy (FTIRS) on powder surfaces

Spectral resolution: 0.2 cm-1

In-situ measurements at variable pressure range: 10-10 mbar < P < 1 bar

In-situ measurements at variable temperature range: 110 K to 1000 K (liquid N2 cooling)

10-10- 10-11 mbar base pressure

Gas dosing system permitting in-situ experiments

Direct sample transfer under UHV from and to the UHV system


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

Bending magnet

Vacuum spectrometer: 10-10000 1/cm, IR micro-spectrometer: 350 to 5200 1/cm (30-700 1/cm upon request)