Related Experiment Video
Updated: Jun 16, 2026

08:13
A Filter-based Surface Enhanced Raman Spectroscopic Assay for Rapid Detection of Chemical Contaminants
Published on: February 19, 2016
Remote detection of pollutants using resonance Raman scattering
Applied Optics
|February 16, 2010
Summary
Resonance Raman cross section calculations for diatomic molecules reveal significant enhancements in nitrogen dioxide (NO2) and sulfur dioxide (SO2). These findings inform the sensitivity of resonance Raman lidar systems.
Area of Science:
- * Molecular Spectroscopy
- * Atmospheric Remote Sensing
Background:
- * Resonance Raman scattering is a sensitive spectroscopic technique.
- * Previous studies have indicated significant resonance effects in certain molecules.
Purpose of the Study:
- * To calculate the resonance Raman cross sections for diatomic molecules.
- * To evaluate the potential of resonance Raman scattering for lidar applications.
Main Methods:
- * Theoretical calculations of resonance Raman cross sections.
- * Integration of calculated cross sections with experimental data for NO2 and SO2.
Main Results:
- * Resonance Raman cross sections were computed for several diatomic molecules.
- * Large resonance enhancements were observed and quantified for nitrogen dioxide (NO2) and sulfur dioxide (SO2).
Conclusions:
- * The study provides crucial data for understanding resonance Raman scattering in diatomic molecules.
- * The findings suggest that resonance Raman lidar systems can achieve high sensitivity for detecting NO2 and SO2.
Related Concept Videos
Raman Spectroscopy: Overview
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 the...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and the...
Raman Spectroscopy Instrumentation: Overview
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...
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...
Gas Chromatography: Types of Detectors-II
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...

