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Related Experiment Video

Updated: Jun 13, 2025

Author Spotlight: Development and Application of SERS Flexible Substrates Using Synthesized AgNPs
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A Surface-Enhanced Raman Scattering Substrate with Tunable Localized Surface Plasmon Resonance Absorption Based on

Guanzhou Lin1,2, Meizhang Wu3,4, Rui Tang1,2

  • 1National Key Laboratory of Advanced Micro and Nano Manufacture Technology, Beijing 100871, China.

Sensors (Basel, Switzerland)
|September 14, 2024
PubMed
Summary

This study presents a novel silver nanoparticle (AgNP) structure for enhanced localized surface plasmon resonance (LSPR). The method ensures uniform AgNP distribution and stable LSPR for applications like SERS substrates.

Keywords:
Ag nanoparticlesLSPRSERS

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Optics

Background:

  • Silver nanoparticles (AgNPs) exhibit localized surface plasmon resonance (LSPR) in free space.
  • AgNPs are prone to oxidation, and their deposition can suffer from the coffee-ring effect, leading to non-uniform distribution.
  • Controlling AgNP distribution and stability is crucial for device performance.

Purpose of the Study:

  • To propose and construct a three-layer AgNP-dielectric-metal structure.
  • To synthesize stable AgNPs using an improved Tollens method.
  • To suppress the coffee-ring effect for uniform AgNP distribution and precise LSPR regulation.

Main Methods:

  • Synthesis of AgNPs via an improved Tollens method.
  • Controlled solution evaporation to mitigate the coffee-ring effect.
  • Fabrication of a three-layer AgNP-dielectric-metal structure.

Main Results:

  • Uniform distribution of AgNPs achieved by suppressing the coffee-ring effect.
  • Effective localization of energy and regulation of LSPR by AgNPs on the dielectric layer.
  • Demonstration of precise regulation of the LSPR resonance peak.

Conclusions:

  • The proposed three-layer structure offers precise control over LSPR.
  • The developed AgNP synthesis and deposition method enhances stability and uniformity.
  • The structure shows potential as a versatile Surface-Enhanced Raman Spectroscopy (SERS) substrate.