Raman Spectroscopy Page
Last updated: 20210317 mtim
Raman Spectroscopy is a molecular vibration technique and is used in a wide variety of applications.
The sample is excited by laser of a certain wavelength and the inelastically scattered photons from the sample are collected and delivered to a CCD Array detector.
The resulting spectra is a fingerprint of the sample under test.
Raman is complimentary to FTIR. FTIR is sensitive to non symetric molecules, Raman is sensitive to symetric bonds.
Raman can be used to measure:
Raman shift, Photoluminescence, Crystal Lattice vibrations, Temperature, Stess
Materials, Life, Chemical, Earth & Analytical sciences.
Materials Science Applications: Carbon, 2D Materials, Nanotechnology, Photovoltaics, Battery Technology, Semiconductors and Catalysis.
Renishaw Invia Reflex Raman Confocal Microscope
Standard Operting Procedure (PDF)
This is a fully automated confocal Raman microscope system with three laser excitation lines a motorized stage and open sample compartment to accommodate cryostats.
A Temperature controlled microscope stage is available for temperature dependent measurements.
Data Acquisition Modes:
Point Mapping, Imaging - Stream HR fast imaging, Depth Profiling, Polarization, Time Dependent, Temperature Dependent, Photoluminescence
532nm 50mw (With Computer Controlled Linear Polarizer)
785nm 100mw, Bar Laser
The laser power changed using computer controlled neutral density filters
1” CCD array, Deep Depletion for enhanced IR Range
400-1050nm, 1024 X 256 pixel
Holographic Reflectance Gratings:
600l/mm, 1200l/mm, 2400l/mm
473nm edge 10%@150cm-1 shift
532nm eclipse (Notch) <15cm-1 shift, Stokes & Antistokes
532nm edge ~100cm-1shift
785nm edge 10%@50cm-1 shift
Leica Optical Microscope
Infinity Corrected, 200mm Tube Length, semi parfocal objectives
Free Space with linterlocked (laser safe) enclosure
External Reflected Light
Objectives: Semi par-focal
Objective Opening WD NA
10X 4mm 12mm 0.25
LWD50X 2mm 8mm 0.50
50X 4mm 350um 0.75
LWD100X 2mm ~3mm 0.75
100X 2mm 0.1mm 0.90
External Microscope Lamp, Reflected Light Polarization
Renishaw HSES motorized stage
Step Size: 100nm, Stage Travel: 112mm x 76mm
Rotating Microscope Stage - for polarization experiments
Temperature controlled Microscope Stage
Linkam THMS600 (-196deg C to 600deg C).
Macro Sampling Set:
Cuvettes, Powders , Capillaries, Etc.
Renishaw Wire 4,4 ,(Software available to users for data analysis)
Spectral Reference Libraries - Organic Polymers, Inorganic materials, Sample substrates
Computer & Monitor, HP Computer, Monitor 22”
Kaiser Hololab 5000 Modular Research Raman Microscope & Spectrometer (Retired)
785nm, 400mw Solid State Laser
Range: 200 to 3400 Raman shift
Leica DLMP Optical Microscope
Objectives: 10X, 50X, 100X, LWD50X
Macro Sampling Accessory