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Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

2.6K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

1.8K
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
1.8K
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

1.5K
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
1.5K

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Related Experiment Video

Updated: Apr 30, 2026

The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements
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The Frequency Domain Thermoreflectance Technique for Thermal Property Measurements

Published on: December 5, 2025

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Ice thickness measurements by Raman scattering.

Sergey M Pershin, Vasily N Lednev, Vladimir K Klinkov

    Optics Letters
    |May 3, 2014
    PubMed
    Summary

    A compact Raman LIDAR system provides express, noncontact ice thickness measurements. This technique accurately detects the ice-water interface and air-ice surface, showing promise for field applications.

    Area of Science:

    • Environmental Science
    • Geophysics
    • Optical Engineering

    Background:

    • Accurate ice thickness measurement is crucial for various applications, including climate monitoring and infrastructure management.
    • Traditional methods for ice thickness assessment can be time-consuming, invasive, or limited in scope.

    Purpose of the Study:

    • To develop and evaluate a compact Raman LIDAR system for rapid, noncontact ice thickness measurements.
    • To assess the accuracy and feasibility of this technique for field applications.

    Main Methods:

    • Utilized a compact Raman LIDAR system equipped with a spectrograph.
    • Employed the spectral differences between ice and liquid water to identify the ice-water interface.
    • Used elastic scattering detection for identifying the air-ice surface.

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    Characterization of Nanocrystal Size Distribution using Raman Spectroscopy with a Multi-particle Phonon Confinement Model
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    Main Results:

    • Achieved high accuracy with an error of only 2 mm for an 80 mm thick ice sample.
    • Demonstrated the system's capability for express, noncontact thickness determination.
    • Validated the technique's effectiveness in laboratory settings.

    Conclusions:

    • The developed Raman LIDAR system offers a promising solution for express, noncontact ice thickness measurements.
    • This technique has significant potential for application in field experiments and environmental monitoring.