Raman Spectroscopy
Raman Spectroscopy
Raman Spectroscopy (pronunciation: /ˈrɑːmən/ spectroscopy) is a spectroscopic technique used to observe vibrational, rotational, and other low-frequency modes in a system. It relies on Raman scattering, or inelastic scattering of photons, from molecules.
Etymology
The technique is named after Indian scientist C. V. Raman, who discovered the Raman effect in 1928.
Description
Raman spectroscopy is commonly used in chemistry to provide a structural fingerprint by which molecules can be identified. It is based on the interaction of light with the chemical bonds within a material. The energy difference between the incident photon and the scattered photon corresponds to the energy of a vibrational mode of the scatterer, which allows for the identification of different materials.
Applications
Raman spectroscopy has a wide range of applications in various fields including material science, biochemistry, forensics, geology, and medicine. In medicine, it is used for diagnostic purposes, to identify diseases by analyzing the spectral signature of the disease in the patient's tissue.
Related Terms
- Raman scattering: The inelastic scattering of photons by matter, meaning that there is an exchange of energy and a change in the light's direction.
- Photon: A type of elementary particle, the quantum of the electromagnetic field including electromagnetic radiation such as light.
- Spectroscopy: The study of the interaction between matter and electromagnetic radiation as a function of the wavelength or frequency of the radiation.
- Inelastic scattering: A process in which the kinetic energy of an incident particle is not conserved (in contrast to "elastic scattering").
External links
- Medical encyclopedia article on Raman Spectroscopy
- Wikipedia's article - Raman Spectroscopy
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