Raman Spectrometer
Raman Spectrometer - Related Videos
07:52
A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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Cited by 7 •
2017
We present a technique for Raman spectroscopic analysis of highly radioactive samples compatible with any standard micro-Raman spectrometer, without any radioactive contamination of the instrument. We also show some applications using actinide compounds and irradiated fuel materials.
07:44
Resonance Raman Spectroscopy of Extreme Nanowires and Other 1D Systems
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Cited by 1 •
2016
The paper describes a method for producing extreme nanowires by melt infiltration into carbon nanotubes and how 1D systems may be characterized and investigated using Resonance Raman Spectroscopy to determine vibrational and optical excitation energies.
01:25
IR Spectrometers
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2024
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
09:26
Raman Spectroscopy for Chemical Analysis
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2023
Source: Laboratory of Dr. Ryoichi Ishihara — Delft University of Technology Raman spectroscopy is a technique for analyzing vibrational and other low frequency modes in a system. In chemistry it is used to identify molecules by their Raman fingerprint. In solid-state physics it is used to characterize materials, and more specifically to investigate their crystal structure or crystallinity. Compared to other techniques for investigating the crystal structure (e.g. transmission electron...
06:48
A Multimodal Wide-Field Fourier-Transform Raman Microscope
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2025
A wide-field Fourier-transform microscope, based on a compact and ultra-stable birefringent interferometer, allows the parallel acquisition of spectra for all pixels of a 2D detector. The time-domain approach enables the disentanglement of photoluminescence and Raman signals, and allows rapid Raman mapping (~5 ms/pixel) with ~1-µm spatial and 23-cm-1 spectral resolution.
FAQs
Raman shifts correspond to molecular vibrations associated with chemical bonds. Their positions and overall spectral pattern provide a chemical signature that helps distinguish compounds and characterize molecular structure. In practice, the spectrum can therefore support both material identification and analysis of composition, rather than merely showing that a sample scatters the incident light.
A monochromatic laser provides a defined incident light signal against which changes in the scattered photons can be measured. The instrument detects the small fraction that undergoes inelastic scattering and represents those changes as Raman shifts. This separation connects features in the resulting spectrum with molecular vibrations and chemical bonds in the sample.
Inelastic scattering changes the energy of scattered photons, unlike scattering that leaves their energy unchanged. A Raman spectrometer records these energy-related shifts as a spectrum. Because the shifts are associated with molecular vibrations, the resulting pattern contains information about chemical bonds and structure that can be used to characterize materials.
Raman analysis can often examine solids, liquids, and other complex samples with minimal preparation. The measurement may also be performed without altering the material, allowing the same sample to remain available for further work. These characteristics are especially useful when preparation could complicate chemical analysis or when preserving the original material matters.
A typical measurement directs monochromatic laser light onto the sample, collects the scattered light, and detects the fraction that has undergone inelastic scattering. The instrument then produces a spectrum of Raman shifts. Interpreting that spectrum in relation to molecular vibrations and chemical bonds provides information for identification, composition analysis, or structural characterization.
Chemists may choose this instrument when they need to identify a compound, assess composition, characterize molecular structure, or monitor a chemical reaction. Its usefulness across solids, liquids, and complex samples, together with minimal preparation and generally nondestructive measurement, supports applications in research and quality control.
Reaction monitoring uses changes in the measured Raman spectrum to follow chemical behavior over time. Since spectral features are associated with molecular vibrations and chemical bonds, shifts in the observed pattern can provide information about changing composition or structure. This makes the technique relevant when researchers need analytical insight during a chemical process.