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Related Concept Videos

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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Ultrafast Time-resolved Near-IR Stimulated Raman Measurements of Functional &#960;-conjugate Systems
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Tip-Enhanced Raman Spectroscopy.

Zhenglong Zhang1,2,3, Shaoxiang Sheng4, Rongming Wang1

  • 1School of Mathematics and Physics, University of Science and Technology Beijing , Beijing, 100083, People's Republic of China.

Analytical Chemistry
|August 30, 2016
PubMed
Summary
This summary is machine-generated.

Tip-enhanced Raman spectroscopy (TERS) combines Raman spectroscopy and scanning optical microscopy for high-sensitivity analysis. This technique uses a metallic tip to achieve high spatial resolution, advancing optical analytical methods.

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy
  • Nanotechnology

Background:

  • Tip-enhanced Raman spectroscopy (TERS) integrates Raman spectroscopy with apertureless near-field scanning optical microscopy.
  • It utilizes a metallic tip that resonates with local surface plasmon modes.

Purpose of the Study:

  • To introduce the fundamental principles of TERS.
  • To outline common experimental setups and various scanning probe microscopy (SPM) technologies used in TERS.
  • To discuss different excitation and collection configurations in TERS.

Main Methods:

  • TERS employs a sharpened metallic tip to locally enhance the Raman signal.
  • Near-field interactions between the tip and the sample surface are exploited.
  • Combines optical spectroscopy with the high resolution of SPM.

Main Results:

  • TERS offers a powerful approach for high-sensitive and high-spatial-resolution optical analysis.
  • Demonstrates the capability to achieve sub-wavelength resolution in chemical imaging.
  • Highlights recent advancements and applications in the field of TERS.

Conclusions:

  • TERS represents a significant advancement in optical analytical techniques.
  • The technique provides unprecedented sensitivity and spatial resolution for material characterization.
  • Ongoing research continues to expand the capabilities and applications of TERS.