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Category
- Spectroscopy and Spectrometry » Raman Spectrometer
Booking Details
Facility Management Team and Location
Facility Features, Working Principle and Specifications
Working Principle:
Light reflected of Raman-active samples irradiated with monochromatic radiation consists of a Raman component having slightly different wavelength as compared to that of the incident radiation. A spectrometer and detector are used to measure intensity of reflected light and it's corresponding wavelength to give us Raman spectrum for the sample.
Features:
Following measurements can be performed using Raman/PL signal-
- Spectral Analysis
- Mapping
- Depth Profiling
Aforementioned measurements can also be performed-
- While varying temperature (Temperature-dependent Analysis)
- While varying degree of polarization / orientation of sample (Polarization-dependent Analysis)
- At specific intervals of time (Time-dependent Analysis)
Specifications:
Spectral Range of System
- Raman - 50 to 4000 cm-1
- PL - 330 to 1600 nm
Motorized Stage
- Maximum travel distance of 110 mm x 75 mm x 25 mm with minimum step size of 50 nm x 50 nm x 10 nm.
- Minimum step-size for mapping is 100 nm.
Range for Temperature-dependent Analysis
- 300K to 12K (using CCR)
- 300K to 1200K (using furnace)
Polarization-dependent Analysis
- Incident light can be polarized as Normal, Orthogonal or Circular.
- Transmission axis of analyzer can be oriented at any angle between 0 and 360 degrees.
- Sample can be oriented at any angle between 0 and 360 degrees using rotating stage accessory.
Additional measurements
- Low-wavenumber analysis from 15 cm-1 using LWN filter.
- Fiber-optic probe for analysis of samples which cannot be directly placed on the microscope stage.
Instructions for Registration, Sample Preparation, User Instructions and Precautionary Measures
Mention the following -
- Number of samples and type of analysis.
- Excitation laser wavelength required.
- Area to be mapped and step-size to be used (in case of mapping).
- Specific temperatures (in case of temperature-dependent analysis).
- Polarization of incident light and orientations of transmission axis for analyzer (in case of polarization-dependent analysis).
- Time intervals (in case of time-dependent analysis).
• Maximum size of sample which can be placed on the microscope stage is 50 mm x 50 mm x 30 mm.
• For temperature-dependent studies sample size should be less than 3 mm x 3 mm x 3 mm.
• If possible, use of coolants/lubricants should be avoided when resizing the samples.
• Sample should remain stable upon exposure to high intensity laser beam.
• For low-temperature analysis, sample must be able to withstand high vacuum conditions.
• For high-temperature analysis, sample should not deform or emit fumes as temperature is increased.
• System’s optical microscope may not be able to acquire data from particles/structures having size less than 100 nanometers.
Charges for Analytical Services in Different Categories
Applications
Pharmaceuticals and Cosmetics
Geology and Mineralogy
Carbon Materials
Semiconductors
Life Sciences
Polymer science
Sample Details
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SOP, Lab Policies and Other Details
Publications
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carbide MXene quantum dots decorated with arginine for the fluorescence
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Actuators B: Chemical. 2024 Apr 1;404:135226
• Patra U, Mujeeb F, Dhar S. Vapor–Liquid–Solid-Mediated Layer-by-Layer
Growth of Stepped-Wedge-Shaped WS2 Microribbons Using the Chemical Vapor
Deposition Technique. Crystal Growth & Design. 2024 Feb 5
• Mandal KK, Singh AK, Kumar B, Shah AP, Vij R, Majumder A, Khunte JJ,
Achanta VG, Kumar A. Emission engineering in monolithically integrated silicon
nitride microring resonators. arXiv preprint arXiv:2401.04963. 2024 Jan 10