Advantages and disadvantages of Raman Spectroscopy

Advantages of Raman Spectroscopy

  • many organic and inorganic materials are suitable for Raman analysis. These can be solids, liquids, polymers or vapors.
  • no sample preparation needed.
  • not interfered by water.
  • non-destructive.
  • highly specific like a chemical fingerprint of a material.
  • Raman spectra are acquired quickly within seconds.
  • samples can be analyzed through glass or a polymer packaging.
  • laser light and Raman scattered light can be transmitted by optical fibers over long distances for remote analysis.
  • in Raman spectroscopy, the region from 4000 cm-1 to 50 cm-1 can be covered by a single recording.
  • Raman spectra can be collected from a very small volume (< 1 μm in diameter).
  • inorganic materials are easily analysable with Raman spectroscopy.

Disadvatantages of Raman Spectroscopy

  • can not be used for metals or alloys.
  • the Raman effect is very weak. The detection needs a sensitive and highly optimized instrumentation.
  • fluorescence of impurities or of the sample itself can hide the Raman spectrum. Some compounds fluoresce when irradiated by the laser beam.
  • sample heating through the intense laser radiation can destroy the sample or cover the Raman spectrum.

[Reference: University of Cambridge – Dissemination of IT for the Promotion of Materials Science (DoITPoMS).]