All Research Facilities

Laser Raman Imaging System

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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] in

Contact no.

022-2576 4573 022-2576 4675

Location

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 Mukherji
Prof. Dipanshu Bansal
Prof. Anshuman Kumar

Registration Link:

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Information-IIT Bombay users

Internal Registration File
Technical Specifications

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
(1 hr 30 min)

5000/ per slot*

1000/- per slot*

2000/- per slot*

500/- per slot*
Central facility presentation