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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

2.5K
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

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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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Related Experiment Video

Updated: Apr 22, 2026

Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates
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Clinical probe utilizing surface enhanced Raman scattering.

Jeonghwan Kim1, Dooyoung Hah2, Theda Daniels-Race3

  • 1Division of Electrical and Computer Engineering, Louisiana State University , 3104-B Patrick Taylor Hall, Baton Rouge, Louisiana 70803.

Journal of Vacuum Science and Technology. B, Nanotechnology & Microelectronics : Materials, Processing, Measurement, & Phenomena : JVST B
|October 16, 2014
PubMed
Summary
This summary is machine-generated.

This study demonstrates a novel surface-enhanced Raman scattering probe capable of analyzing samples from over 1 meter away. This advancement brings advanced molecular detection closer to clinical applications.

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Materials Science

Background:

  • Surface-enhanced Raman scattering (SERS) significantly amplifies Raman signals using nanorough metallic surfaces.
  • Previous SERS methods utilized gold on transparent substrates, enabling analysis of samples placed against the surface.
  • Analysis of opaque samples or those not in direct contact was limited.

Purpose of the Study:

  • To develop a SERS system capable of analyzing samples at a distance.
  • To adapt SERS for potential clinical environments where direct sample contact may be difficult.
  • To enable remote detection of molecular signals from solid specimens.

Main Methods:

  • Coupling a commercial Raman spectrometer to a distant probe.
  • Utilizing nanorough metallic surfaces to enhance Raman signals.
  • Obtaining Raman spectra from solid specimens located more than 1 meter away.

Main Results:

  • Successfully obtained Raman signals from both the surface and interior of a solid specimen.
  • Demonstrated the capability of analyzing samples at distances exceeding 1 meter.
  • Validated the use of a distant probe for SERS measurements.

Conclusions:

  • The developed distant probe SERS system is effective for remote molecular analysis.
  • This technology has significant potential for non-invasive clinical diagnostics.
  • Opens up SERS applications in environments requiring sample isolation or remote access.