Raman-Microscope

Renishaw inVia

Measurement Method  

Raman spectroscopy is a spectroscopic technique based on inelastic scattering of monochromatic light, usually from a laser source.  Inelastic scattering means that the frequency of photons in  monochromatic light changes upon interaction with a sample. Photons of the laser light are absorbed by the sample and then reemitted.  Frequency of the reemitted photons is shifted up or down in comparison with original monochromatic frequency, which is called the Raman effect. This shift provides information about vibrational, rotational and other low frequency transitions in molecules.   Raman spectroscopy can be used to study solid, liquid and gaseous samples.

Identify unknown materials from their unique Raman spectral fingerprints, typically using databases of known spectra.

Differentiation of materials, distinguish even very similar crystal forms and structure

Quantification of material composition and properties

study changes in the details of the spectrum—such as the height, width, and position of the Raman bands—and determine things like:

•     the relative amount of material
•     layer thickness - from monolayer up to hundreds of nanometers
•     crystallinity
•     whether it is under compression or tension
•     temperature