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Laser Raman Spectroscopy

The Raman effect arises when the incident light (laser radiation) excites molecules in a sample which subsequently scatter the light. While most of this scattered light is at the same wavelength as the incident light, some is scattered at a different wavelength. This inelastically scattered light is called Raman scatter.

The energy difference between the incident light (Eo) and the Raman scattered light (Es) is equal to the energy involved in changing the molecule's vibrational state, (Ev). This energy difference is called the Raman shift.  



Our laboratory has a Horiba Jobin Yvon LabRam 300 confocal Raman (0.3 cm-1 resolution at 680 nm).  It is equiped with:

- Internal He-Ne laser (633 nm)
- External Ar Ion laser (Coherent Innova 90C, 488 nm and 514 nm)
- Dual notch filters down to 30 cm-1  
- Dual gratings
- Software controlled motorized stage down to lateral resolution on 1 micron and axial resolution of 2 microns CCD detector
- Operando cell capable of operation up to 1000°C and 4-5 bar maximum pressure
- Rotating pellet holder to prevent sample heating
- Multipass cell for liquids
- Portable mass spectrometer availabe for product analysis