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Related Concept Videos

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...
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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.
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IR Frequency Region: Fingerprint Region01:03

IR Frequency Region: Fingerprint Region

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IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...
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Applications of IR Spectroscopy: Overview01:11

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The non-destructive nature and ability to provide valuable chemical information make IR spectroscopy a versatile technique with broad applications in various scientific and industrial fields. IR spectroscopy is commonly used to identify and characterize organic and inorganic compounds. It provides information about the functional groups present in a molecule and the bonding between atoms. This helps in the structural elucidation of compounds during organic synthesis, pharmaceutical research,...
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A Multimodal Wide-Field Fourier-Transform Raman Microscope
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Research applications of Raman spectroscopy and Raman imaging for fingermark analysis.

Li-Xue Wang1, Ya-Bin Zhao2, Cheng-Long Huang2

  • 1Department of Forensic Science, People's Public Security University of China, Beijing 100038, China; Department of Forensic Science, AnHui Police College, Hefei 238000, China.

Science & Justice : Journal of the Forensic Science Society
|April 3, 2026
PubMed
Summary
This summary is machine-generated.

Raman spectroscopy and Raman imaging offer advanced, non-destructive methods for fingermark analysis. These techniques enable detailed chemical and morphological insights, aiding in identification and determining deposition time.

Keywords:
Fingermark analysisForensic scienceRaman imagingRaman spectroscopy

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Area of Science:

  • Forensic Science
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Fingermark analysis is crucial for forensic investigations.
  • Traditional methods have limitations in chemical detail and non-destructive capabilities.
  • Raman spectroscopy provides unique molecular vibration information.

Purpose of the Study:

  • To systematically review the applications of Raman spectroscopy and imaging in fingermark analysis.
  • To explore advancements in fingermark component imaging and ridge development.
  • To highlight chemical information extraction for population characteristics and deposition time.

Main Methods:

  • Review of high-speed Raman imaging, Surface-Enhanced Raman Scattering (SERS), and combined techniques.
  • Integration of conventional development methods with SERS.
  • Analysis of chemical components within fingermarks.

Main Results:

  • Raman spectroscopy enables detailed chemical component analysis and morphological visualization of fingermarks.
  • Various Raman-based techniques, including SERS, enhance fingermark detection and analysis.
  • Applications include identifying special components for population characteristics and inferring deposition time.

Conclusions:

  • Raman spectroscopy and imaging are powerful, non-destructive tools for comprehensive fingermark analysis.
  • Future prospects involve further integration and refinement of these spectroscopic techniques in forensics.
  • These methods significantly advance the capabilities in forensic science for fingermark examination.