BTU overview
Faculty 1
Chair of Applied physics / sensor technology Prof. Dr. rer. nat. habil. Dieter Schmeißer

FTIR Spectroscopy (Fourier-Transformation Infrared Spectroscopy)

Fundamentals

RangeWave number [cm-1]Wave lenght [µm]
Near Infrared13300 ... 40000.75 ... 2.5
Middle Infrared4000 ... 4002.5 ... 25
Far Infrarot400 ... 1025 ... 1000

Literature

  • P.R. Griffiths and J.A. de Haseth: Fourier Transform Infrared Spectrometry. New York, Wiley Interscience, 1986
  • J.R. Ferraro and L.T. Basile: Fourier Transform Infrared Spectroscopy: Applications to chemical systems. Vol. 1,    New York, Academic Press 1978
  • W. Possart et. al.: Infrared Reflection Spectroscopy of Polycyanurate Thin Films on Solids-State of the Interpahase.    J. Adhesion, 1995, Vol. 54, pp. 261-275

The infrared spectrocmeter 
main components:

  • Infrared source
  • Optical system
  • Detector
  • Plotter and/or Display.
Fig. 1 Schematic of the Michelson Interferometer

FTS 60B of Fa. Bio Rad

Fig. 2 FTIR-Spectrometer FTS60B in the Lab of the chair Applied Physics and Sensors

Applications

Fig. 3 Decrease of the CN Peaks at 2271 cm-1 with rising curing
Fig. 4 Incease of the CH-Peaks at 2970 cm-1 with rising polymer thickness