Characterization of surface contaminants using infrared microspectroscopy

Dianna S. Blair; Kenneth J. Ward

doi:10.1117/12.45133

1 April 1991 Characterization of surface contaminants using infrared microspectroscopy

Dianna S. Blair, Kenneth J. Ward

Proceedings Volume 1437, Applied Spectroscopy in Material Science; (1991) https://doi.org/10.1117/12.45133
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

Infrared spectroscopy (IR) is a vibrational spectroscopic technique used for the nondestructive identification of molecular species. It provides information about molecular structure by determining the frequency and intensity of light a compound absorbs in the infrared region. The resultant IR absorption spectrum is characteristic of the compound. This spectrum is considered one of the compound's physical properties, like its density or boiling point. However, unlike these other properties only optical isomers have identical infrared absorption spectra. Infrared spectroscopy can be performed on molecular species in any physical state. Therefore, gases, liquids, and solids can all be sampled. Generally, because of the high information content of the infrared spectra of organic molecules IR is most useful for the identification of organic materials. However, many inorganics also exhibit IR detectable molecular vibrations and therefore can be identified by this technique. The paper deals briefly with the use of infrared spectrometers coupled to microscopes, and methods of compressing spectral data by integrating absorbance intensity over a characteristic frequency range.

Citation Download Citation

Dianna S. Blair and Kenneth J. Ward "Characterization of surface contaminants using infrared microspectroscopy", Proc. SPIE 1437, Applied Spectroscopy in Material Science, (1 April 1991); https://doi.org/10.1117/12.45133

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