Comparison of Infrared Spectroscopy and Raman Spectroscopy

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This document introduces the characteristics of each spectroscopy method and the spectra obtained when comparing infrared spectroscopy and Raman spectroscopy. Both infrared spectroscopy and Raman spectroscopy are vibrational spectroscopies that investigate the vibrational energy of molecules, but the shapes of the spectra obtained from each method differ even when measuring the same substance. Infrared spectroscopy and Raman spectroscopy are complementary, and information that cannot be obtained from either analysis alone can be acquired more detailed and accurately by conducting both analyses. For more details, please refer to the published catalog.

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Comparison of Infrared Spectroscopy and Raman Spectroscopy
By conducting two analyses, it is possible to obtain more detailed and accurate results!

【Raman Spectroscopy Features】 ■ Raman scattering occurs when the polarizability changes with vibration (Raman activity). ■ High symmetry, such as molecules made of the same atoms or those with small differences in electronegativity. ■ Vibrations that are highly symmetric and stretch while maintaining symmetry have high Raman activity. *For more details, please refer to the PDF document or feel free to contact us.
Foreign substance analysis and component analysis: Comparison of micro-Raman and FTIR.
Spectroscopic analysis is suitable for component analysis and qualitative analysis of foreign substances.

For more details, please refer to the PDF document or feel free to contact us.
Would you like to check the deterioration of resin through FT-IR analysis?
Detect and analyze the absorption wavelengths of organic molecular groups (functional groups)!

For more details, please refer to the PDF document or feel free to contact us.
Research Institute of Chemical Reaction Mechanisms, Material Degradation Analysis (Decomposition and Deterioration of PET)
We will suggest appropriate analysis methods based on the condition of polymer materials and samples!

For more details, please refer to the PDF document or feel free to contact us.
Measurement of resin curing degree using FT-IR.
It is possible to monitor the progress of the adhesive curing reaction (degree of curing)!

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Analysis of inorganic compounds using micro-Raman spectroscopy.
Analysis of inorganic compounds such as metal oxides is also possible! We will introduce the analysis of black spots on the surface of copper-clad laminates.

【Copper Oxidation Mechanism】 ■2Cu + 1/2O2 → Cu2O ■Cu2O + 1/2O2 → 2CuO *For more details, please refer to the PDF document or feel free to contact us.*
Analysis of multilayer materials using micro-Raman.
Depth-direction measurements using Raman spectroscopy! Material analysis of each layer is possible from the surface of multilayer films.

[Analysis Case] ■ The polarizer used in the liquid crystal panel has a structure that sandwiches a layer of polyvinyl alcohol (PVA) with added iodine between layers of triacetyl cellulose (TAC). ■ Continuous measurements of the polarizer in the depth direction using a micro-Raman spectrometer revealed a change from TAC to PVA+I2 to TAC to the adhesive layer as the depth increased. *For more details, please refer to the PDF document or feel free to contact us.