The Basics – Raman Spectroscopy

Raman Spectroscopy is used to analyse the vibrational modes of a substance either in the solid, liquid or gas state. It relies on the inelastic scattering (Raman Scattering) of monochromatic light produced by atoms and molecules. The radiation-matter interaction results in the energy of the exciting photons to be shifted up or down. The shift in energy gives information about the vibrational states in the system which appears as a spectral distribution or Raman spectrum. This spectrum therefore provides an unique fingerprint by which the substances can be identified and structurally analyzed.