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Related Experiment Video

Updated: Jun 2, 2026

Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates
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Surface Enhanced Raman Spectroscopy Detection of Biomolecules Using EBL Fabricated Nanostructured Substrates

Published on: March 20, 2015

Quantitative surface enhanced Raman scattering detection based on the "sandwich" structure substrate.

Junmeng Zhang1, Shengchun Qu, Lisheng Zhang

  • 1Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|May 3, 2011
PubMed
Summary
This summary is machine-generated.

A novel sandwich-structured substrate enhances molecular detection sensitivity using surface-enhanced Raman scattering (SERS). This substrate achieves ultra-high sensitivity for Rhodamine 6G and Melamine detection, enabling precise quantitative analysis.

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Area of Science:

  • Nanotechnology
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Surface-enhanced Raman scattering (SERS) is a powerful technique for molecular detection.
  • Developing highly sensitive and reproducible SERS substrates is crucial for quantitative analysis.
  • Existing SERS substrates often face limitations in sensitivity and stability.

Purpose of the Study:

  • To design and fabricate a novel sandwich-structured substrate for enhanced SERS detection.
  • To investigate the stability, reproducibility, and sensitivity of the proposed SERS substrate.
  • To evaluate the substrate's potential for quantitative molecular detection.

Main Methods:

  • Fabrication of silver nanoarrays on porous anodic aluminum oxide (AAO) via electrodeposition.
  • Preparation of silver nanoparticles (SNPs) using the Lee-Meisel method.
  • Integration of SNPs and silver nanoarrays to form a sandwich structure for molecular detection.

Main Results:

  • The sandwich-structured substrate demonstrated excellent stability and reproducibility.
  • Achieved ultra-high detection sensitivity for Rhodamine 6G (10⁻¹⁹ M) and Melamine (10⁻⁹ M).
  • Observed a strong localized surface plasmon (LSP) coupling, leading to significant electromagnetic field enhancement.

Conclusions:

  • The developed sandwich-structured SERS substrate offers significantly improved detection sensitivity compared to conventional substrates.
  • The linear relationship between SERS intensity and analyte concentration confirms its suitability for quantitative analysis.
  • This substrate holds great promise for sensitive and quantitative molecular detection in various applications.