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This study resolves common issues in infrared surface spectroscopy, such as interference fringes and water-vapor subtraction problems, by modifying Multiple-Angle Incidence Resolution Spectrometry (MAIRS). The new method allows for accurate spectral analysis of thin films without measurement interferences.

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Area of Science:

  • Spectroscopy
  • Surface Science
  • Analytical Chemistry

Background:

  • Infrared surface spectroscopic techniques often suffer from optical interference fringes due to light reflections.
  • Fourier transform infrared spectroscopy faces challenges with water-vapor subtraction, hindering quantitative analysis.
  • These issues affect the accuracy of thin film analysis in techniques like Multiple-Angle Incidence Resolution Spectrometry (MAIRS).

Purpose of the Study:

  • To address and resolve long-standing measurement issues in infrared surface spectroscopy.
  • To improve the quantitative analysis of analyte thin films.
  • To enhance the applicability of Multiple-Angle Incidence Resolution Spectrometry (MAIRS).

Main Methods:

  • Modified Multiple-Angle Incidence Resolution Spectrometry (MAIRS) by fixing the angle of incidence at a large angle.
  • Varied the polarization angle while keeping the incidence angle constant.
  • Focused on spectral analysis by eliminating common measurement interferences.

Main Results:

  • Successfully resolved optical interference fringes in absorption spectra.
  • Overcame the impossibility of water-vapor subtraction in Fourier transform infrared spectroscopy.
  • Enabled accurate spectral analysis of thin films by mitigating measurement troubles.

Conclusions:

  • A simple conceptual change in MAIRS effectively resolves common long-term issues.
  • The modified MAIRS technique allows researchers to focus solely on spectral analysis.
  • This advancement facilitates more reliable quantitative analysis of thin films using infrared spectroscopy.