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Vibrational Spectroscopy

Fourier-Transform Infrared Spectrometer (FTIR) and Microscope

Description:

FTIR spectroscopy is used for structural characterization of organic and inorganic compounds in solids, liquids, gases, and on surfaces. Qualitative and quantitative information may be obtained.

Equipment and applications:

  • Thermo Scientific Nicolet iS50 FT-IR spectrometer with a built-in diamond attenuated total reflection (ATR). The detectors on the main bench are MCT-A (11,700 - 600 cm-1) and DLaTGS (12,500 - 350 cm-1). The detector on the ATR is DLaTGS.
    • On the main bench, transmission, specular reflection, diffuse reflection and multi-bounce ATR measurements are conducted.
    • The built-in diamond ATR is for single-spot ATR measurements.
  • Thermo Scientific Continuum IR microscope with transmission, reflection and attenuated total reflection (ATR) objectives. The detector is MCT-A.
    • IR microscopy is used to analyze micrometer-sized spots and generate a chemical map by scanning an area of a sample. The aperture size can be varied from ca. 20 to 150 micrometers. The motorized x-y sample stage's travel limits are 12 cm x 6 cm.
  • Smart ARK 12 bounce HATR module with a 45 degree ZnSe flat crystal and a 45 degree Ge flat crystal.
    • Multi-bounce ATR is typically used to analyze thin films. Comparing to single bounce ATR, the IR signals in multi-bounce ATR are stronger due to multiple-time interactions of the IR beam with the samples.
  • Diffuse and specular reflection accessories for reflection measurements.