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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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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...
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Raman Spectroscopy: Overview01:20

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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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In-situ Hybridization02:31

In-situ Hybridization

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In situ hybridization (ISH) is a technique used to detect and localize specific DNA or RNA molecules in cells, tissue, or tissue sections using a labeled probe. The technique was first used in 1969 for the investigation of nucleic acids. It is currently an essential tool in scientific research and clinical settings, especially for diagnostic purposes.
Types of probes and labels
A probe is a complementary strand of DNA or RNA that binds to corresponding nucleotide sequences in a cell. Many...
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Fluid-cell Raman Spectroscopy for operando Studies of Reaction and Transport Phenomena during Silicate Glass Corrosion
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In situ SERS and in situ Raman: deciphering interfacial phenomena and processes.

Jingyi Wei1, Sixian Yu2, Tianxiang Zhou1

  • 1Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Material Sciences and Technology, China University of Geosciences, Beijing 100083, China. hanfeng@cugb.edu.cn.

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Summary

This review details in situ Raman and surface-enhanced Raman spectroscopy (SERS) for studying surface reactions. It highlights key principles, advances, and challenges for in situ SERS applications in chemical analysis.

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Area of Science:

  • Surface Science
  • Spectroscopy
  • Chemical Analysis

Background:

  • Raman and SERS provide vibrational spectral data for surface analysis.
  • These techniques are sensitive to molecular electron density, aiding chemical reaction studies.
  • Challenges exist in developing in situ SERS substrates and analyzing complex data.

Purpose of the Study:

  • To systematically review in situ Raman/SERS principles and advances for surface reaction studies.
  • To compile species identifications and spectral features from recent in situ studies.
  • To discuss challenges and future perspectives for in situ SERS.

Main Methods:

  • Brief introduction to SERS mechanisms and influencing factors.
  • Discussion of interfacial phenomena (species transition, electron density, crystalline structure changes).
  • Compilation and analysis of reported in situ SERS studies on surface reactions.

Main Results:

  • Overview of SERS mechanisms and factors affecting in situ measurements.
  • Systematic compilation of species identification and spectral features in surface reactions.
  • Identification of interfacial phenomena crucial for in situ SERS analysis.

Conclusions:

  • In situ Raman/SERS are powerful tools for detailed surface reaction analysis.
  • Further development is needed for robust in situ SERS substrates and data interpretation.
  • Future research should integrate advanced computational methods like machine learning for deeper insights.