Polarized Raman spectra refer to Raman scattering measurements where the incident and scattered light are polarized along specific directions. By using different polarization configurations, researchers can gather additional information about the orientation and symmetry of molecular vibrations in the sample. This technique is useful for studying anisotropic materials and understanding molecular structure and orientation.
Yes, Raman spectroscopy can be performed on metals and alloys to provide information about their molecular vibrations, crystalline structure, and chemical composition. However, since metals and alloys exhibit strong fluorescence and may not produce strong Raman signals, specialized techniques and equipment may be required to overcome these challenges.
Several variations of Raman spectroscopy have been developed.· Surface Enhanced Raman Spectroscopy (SERS)· Resonance Raman spectroscopy· Surface-Enhanced Resonance Raman Spectroscopy (SERRS)· Angle Resolved Raman Spectroscopy· Hyper Raman· Spontaneous Raman Spectroscopy (SRS)· Optical Tweezers Raman Spectroscopy (OTRS)· Stimulated Raman Spectroscopy· Spatially Offset Raman Spectroscopy (SORS)· Coherent anti-Stokes Raman spectroscopy (CARS)· Raman optical activity (ROA)· Transmission Raman· Inverse Raman spectroscopy.· Tip-Enhanced Raman Spectroscopy (TERS)· Surface plasmon polaritons enhanced Raman scattering (SPPERS)
Mercury vapor lamps are used in Raman spectroscopy primarily because they emit strong, continuous spectral lines, particularly in the ultraviolet and visible regions. This provides a stable and intense light source, which is essential for exciting the sample and generating a measurable Raman signal. The specific wavelengths emitted by mercury vapor also match well with the vibrational modes of many molecules, enhancing the sensitivity and resolution of the analysis. Additionally, the high intensity of the light helps to overcome any background fluorescence, improving the clarity of the Raman spectra obtained.
C. V. Raman was awarded the Nobel Prize for his work on the scattering of light and for the discovery of the Raman effect.
Raman active molecules are those that exhibit a change in polarizability during the Raman spectroscopy process. This change results in the scattering of light at different wavelengths, providing information about the molecular structure and vibrations of the molecule. Raman spectroscopy is a powerful technique used for chemical analysis and identification.
It depends what you are looking for. There are online databases of Raman spectra for minerals, for example, e.g. https://www.fis.unipr.it/phevix/ramandb.php For characteristic functional groups/molecules and their peaks, it is better to consult a textbook of Raman Spectra, within which you can find tables of peak assignments - take a visit to the library!
Yes, Raman spectroscopy can be performed on metals and alloys to provide information about their molecular vibrations, crystalline structure, and chemical composition. However, since metals and alloys exhibit strong fluorescence and may not produce strong Raman signals, specialized techniques and equipment may be required to overcome these challenges.
Raman is used a lot as it is not sensitive to atmospheric water and CO2 usually won't stand out on the spectra. Its also useful in most settings as there is no sample prep needed, which is quite a difference to somthing like IR spectra which need nujol mulls or KBr plates. In comparison to IR the bands of the spectra are usually smaller and sampling is non-destructive. In an industrial setting raman can be used with fiber optic cables to remotely monitor reactions and product formation.
Anne Hamilton McKague has written: 'Vibrational Raman spectra of hydrogen and deuterium in the condensed phases' -- subject(s): Raman effect, Physics Theses, Hydrogen, Deuterium
Kirk W. Brown has written: 'Coherent raman spectroscopy of non-polar molecules and molecular clusters' -- subject(s): Carbon dioxide, Raman spectroscopy, Spectra
no, they should not eat food meant for humans.
Donald Edward Graburn Shaw has written: 'Rotation-vibrational Raman spectrum of ethane C2H6' -- subject(s): Ethanes, Raman effect, Molecular rotation, Physics Theses, Spectra
Charles Alexander Bradley has written: 'The Smekal-Raman spectra and vibrations of some pentatomic molecules' -- subject(s): Molecules, Spectrum analysis
The Raman effect refers to the inelastic scattering of light by molecules, resulting in a change in energy of the scattered photons. This effect provides information about the vibrational and rotational modes of molecules, making it a useful tool for analyzing chemical structures and compositions. Raman spectroscopy is a common technique that utilizes the Raman effect for various applications in chemistry, physics, and materials science.
Several variations of Raman spectroscopy have been developed.· Surface Enhanced Raman Spectroscopy (SERS)· Resonance Raman spectroscopy· Surface-Enhanced Resonance Raman Spectroscopy (SERRS)· Angle Resolved Raman Spectroscopy· Hyper Raman· Spontaneous Raman Spectroscopy (SRS)· Optical Tweezers Raman Spectroscopy (OTRS)· Stimulated Raman Spectroscopy· Spatially Offset Raman Spectroscopy (SORS)· Coherent anti-Stokes Raman spectroscopy (CARS)· Raman optical activity (ROA)· Transmission Raman· Inverse Raman spectroscopy.· Tip-Enhanced Raman Spectroscopy (TERS)· Surface plasmon polaritons enhanced Raman scattering (SPPERS)
Wenxin Ke has written: 'Superconducting and kinetics of freezing of benzene clusters as studied by coherent Anti-Stokes Raman Spectroscopy' -- subject(s): Benzene, Supercooling, Spectra
Chandrasekhara Venkata Raman