Laser Raman Imaging System
Make and Model
Make :Renishaw, UK
Model : Invia Reflex
Installed Date : 25th July 2022
Specifications/Features
-
- Spectrograph equipped with a research-grade microscope capable of producing Raman (wavenumber transfer 50 to 4000 cm-1) and PL (330 nm to 1.6 microns).
- Spectral Range of spectrometer: 200 nm – 1600 nm
- Excitation sources-
Laser available
HeCd 325 nm
Diode 532 nm
HeNe 633 nm
Diode 830 nm
Power
> 25 mW
> 50 mW
> 17 mW
> 200 mW
Spectral resolution (FWHM)
2 cm-1 with 2400 gr/mm
0.5 cm-1 with 2400 gr/mm
1 cm-1 with 1800 gr/mm
0.75 cm-1 with 1200 gr/mm
PL
330 nm to 1600 nm
- Microscope Objective-1) Normal WD-5X,20X,100X ; 2) Long WD-50X ; 3) NUV-15X & 40X
- Imaging/Mapping –XYZ motorized and computer-controlled mapping stage with a minimum travel distance of 110x75x25 mm with a resolution of 50x50x10 nm. Scanning step size for 2D mapping to be better than 50 nm.
- Temperature- 10 to 300 K (CCR), Room temperature to 1500 K (Furnace)
- Libraries- Inorganic and minerals, polymeric materials, biochemical. Raman spectroscopy can provide both chemical and structural information, as well as the identification of substances through their characteristic Raman ‘fingerprint’. Raman spectroscopy extracts this information through the detection of Raman scattering from the sample.
- Other capabilities- Low wavenumber measurements (down to 15cm-1 with 532 nm laser), polarization study with 532 nm laser, remote probe fibre coupling with 532 nm laser.
Application
-
- Pharmaceuticals and Cosmetics
- Geology and Mineralogy
- Carbon Materials
- Semiconductors
- Life Sciences
- Polymer science
Facility in-charge
Contact Email
id-lrs[dot] crnts[at] iitb[dot] ac[dot] inContact no.
022-2576 4573 022-2576 4675Location
Room No: LRS lab,208-A
Floor No:1st Floor
Dept. Name: SAIF/CRNTS
Website URL-https://www.crnts.iitb.ac.in/lris.html
Other contact person(s)
- Pallavi Khapre
- Priyanka Jain
Facility Management Member(s)
(w.e.f. )
Prof. Suparna MukherjiProf. Dipanshu Bansal
Prof. Anshuman Kumar
Registration Link:
Information-IIT Bombay users
Internal Registration File
The Raman effect is based on scattering of light, which includes both elastic (Rayleigh) scattering at the same wavelength as the incident light, and inelastic (Raman) scattering at different wavelengths, due to molecular vibrations. Raman scattering is about a million times less intense than Rayleigh scattering. Therefore, to obtain Raman spectra, it is necessary to prevent Rayleigh scattering from overpowering the weaker Raman scattering.
Raman spectra are measured by exciting a sample using a high-intensity laser beam, with the resulting scattered light being passed through a spectrometer. The Raman shift is the energy difference between the incident light and the scattered light. In the resulting spectrum, the vertical axis is the intensity of the scattered light and the horizontal axis is the wavenumber of the Raman shift (cm-1).
The Raman shift is associated with two different energy bands. The shift at wavelengths higher than that of the incident light is termed Stokes scattering. The shift at wavelengths lower than that of the incident light is termed anti-Stokes scattering. Stokes scattering is observed in the lower wavenumber (longer wavelength) region and anti-Stokes scattering in the higher wavenumber (shorter wavelength) region. Typically, higher-intensity Stokes scattering peaks are used for analysis.
Charges-(18% GST Excluded)
|
Industry |
University |
National Lab/R&D |
IIT Bombay Users |
Raman Analysis |
3000/- per sample |
600/-per sample |
1500/-per sample |
300/- per sample |
T-dependent studies (cryostat 10 to 300 K) |
6000/-per slot* |
1200/-per slot* |
3000/-per slot* |
500/- per slot* |
T-dependent studies (furnace 300 to 1500 K) |
4500/-per slot* |
800/-per slot* |
2250/-per slot* |
400/- per slot* |
Raman Analysis (Imaging/mapping) *Per Slot |
5000/ per slot* |
1000/- per slot* |
2000/- per slot* |
500/- per slot* |