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Polarization-Modulation Emission FT-IR Measurement of Thin Organic Films on Metal Surfaces

Volume 46, Number 1 (Jan. 1992) Page 156-158

Tochigi, Kenji; Momose, Hideto; Misawa, Yutaka; Suzuki, Takaya


A polarization-modulation technique has been combined with Fourier transform infrared (FT-IR) spectrometry to eliminate the large background radiation which interferes with the infrared emission from thin organic films on metal surfaces. A step scan and a continuous scan interferometer which were combined with a photoelastic modulator were also studied, and the step scan system was found to be stabler and have a better S/N. The spectrum of a 12-nm perfluoropolyether film was obtained at 120°C by this system.