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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

270
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...
270

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Updated: May 22, 2025

Visualizing and Quantifying Pharmaceutical Compounds within Skin using Coherent Raman Scattering Imaging
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Investigation of Thin Silicone Films on Opaque Solid Surfaces Using Coherent Raman Scattering Imaging.

Julian Naser1,2,3, George Sarau3,4,5, Jan Wrege1

  • 1Siemens Healthineers AG, Siemensstrasse 1, 91301 Forchheim, Germany.

Applied Spectroscopy
|May 21, 2025
PubMed
Summary

Coherent Raman scattering (CRS) Imaging offers a fast, sensitive method for detecting nanometer-thin surface films. This technique ensures technical cleanliness for critical industrial applications without extensive sample preparation.

Keywords:
CRSCoherent Raman scatteringE-CARSRamancontamination monitoringepi-coherent anti-Stokes Raman microscopypolysiloxanethin films

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Optical Physics

Background:

  • Measuring nanometer-thin films is difficult, requiring complex preparation and conditions.
  • Accurate detection of these films is vital for industrial processes like bonding, coating, and lithography.
  • Current methods lack the speed, sensitivity, or non-invasiveness needed for opaque surfaces.

Purpose of the Study:

  • To investigate the feasibility of epi-detection using coherent Raman scattering (CRS) Imaging for surface contamination monitoring.
  • To demonstrate CRS Imaging as a rapid, high-sensitivity technique for analyzing thin films on opaque surfaces.
  • To showcase the chemical fingerprinting capabilities of CRS Imaging for identifying surface contaminants.

Main Methods:

  • Utilized coherent Raman scattering (CRS) Imaging for epi-detection on various substrate materials.
  • Prepared samples with controlled low surface energy filmic contaminations, specifically polysiloxanes.
  • Applied CRS Imaging to non-transparent surfaces, a novel application for material science surface monitoring.

Main Results:

  • Demonstrated the capability of CRS Imaging for fast scanning of large, non-transparent surfaces.
  • Successfully identified and chemically fingerprinted thin film contaminants atop the surfaces.
  • Confirmed CRS Imaging as a viable technique for sensitive detection of nanometer-scale films.

Conclusions:

  • Coherent Raman scattering (CRS) Imaging is a promising technique for rapid surface contamination monitoring in material science.
  • The method overcomes limitations of traditional techniques, offering high sensitivity and minimal sample preparation.
  • CRS Imaging enables crucial quality control for industries relying on precise surface interfaces.