Raman spectra irradiation effects

Inverse Raman spectroscopy The Inverse Raman effect is a form of Raman scattering, first noted by W.J. Jones and B.P. Stoicheff, wherein stokes scattering can exceed anti-Stokes scattering resulting in an absorption line (a dip in intensity) at the sum of irradiated monochromatic light and Raman frequency of the material. This phenomenon is referred to as the inverse Raman Effect, application of the phenomenon is referred to as inverse Raman spectroscopy, and a record of the continuum is referred to as an inverse Raman spectrum. 

The Raman spectrum of the product of plasma spraying of nanodiamonds shows the formation of well-defined carbon onions (band at 1571 cm-1) and defective carbon onions (1592 cm-1).288 Raman spectroscopy was used to follow the effects of heavy-ion irradiation on nanocomposite carbon films.289 Laser-grown carbon microfibres were characterised by Raman microfibres,290 as were giant fullerene-like hollow spheres generated from C60 by compression at 57 GPa.291... 

A major advantage of Raman spectroscopy for the analysis of biomolecules stems from the fact that water has a weak Raman spectrum. Spectra can be recorded for aqueous solutes at 10 -10 M with little interference from the solvent. For a chromophore under the RR condition the accessible concentration range becomes 10 " -10 M. Moreover, the intensity enhancement associated with the RR effect confers the important advantage of selectivity, allowing one to observe selectively the vibrational spectrum of a chromophore that is just one component of an extremely complex biological system. Because many biomolecules have chromophores with an ultraviolet (UV) resonance condition, one may also selectively excite a chromophore by irradiating these molecule with UV light. This technique is known as Ultraviolet Resonance Raman Spectroscopy (UVRRS). In recent years, Raman difference spectroscopy (RDS) has been developed in... 

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