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Related Experiment Video

Updated: Apr 17, 2026

Author Spotlight: Development and Application of SERS Flexible Substrates Using Synthesized AgNPs
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A sensitive SERS substrate based on Au/TiO2/Au nanosheets.

Li Jiang1, Xiu Liang1, Tingting You1

  • 1Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing 100191, China.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|February 21, 2015
PubMed
Summary

Researchers developed sensitive Surface-Enhanced Raman Spectroscopy (SERS) substrates using gold/titanium dioxide/gold (Au/TiO2/Au) nanosheets. These novel substrates enhance biomolecule detection through increased surface area and plasmonic coupling.

Keywords:
AdenineAuNPsPMBASERSTiO(2)

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Area of Science:

  • Nanomaterials Science
  • Surface Chemistry
  • Spectroscopy

Background:

  • Developing sensitive and reliable substrates is crucial for Surface-Enhanced Raman Spectroscopy (SERS).
  • Existing substrates often face limitations in sensitivity and ease of preparation.
  • Titanium dioxide (TiO2) nanosheets offer a promising platform for nanomaterial integration.

Purpose of the Study:

  • To fabricate and characterize novel Au/TiO2/Au nanosheet structures for enhanced SERS applications.
  • To investigate the influence of structural parameters on SERS signal intensity.
  • To evaluate the potential of these substrates for label-free biomolecule detection.

Main Methods:

  • Fabrication of TiO2 nanosheets.
  • Physical sputtering of gold (Au) nanoparticles onto TiO2 nanosheets to form Au/TiO2/Au structures.
  • Characterization of SERS activity and optimization of fabrication parameters (e.g., gold deposition time, probe concentration).

Main Results:

  • Au/TiO2/Au nanosheet substrates exhibited significantly stronger SERS signals compared to conventional Au/Ti substrates.
  • Increased surface area and plasmonic coupling between adjacent Au nanoparticles were identified as key factors for signal enhancement.
  • Optimization studies identified optimal conditions for probe solution concentration and gold nanoparticle deposition time.

Conclusions:

  • The developed Au/TiO2/Au nanosheet structures serve as highly sensitive and easy-to-prepare SERS substrates.
  • These substrates demonstrate potential for label-free detection of biomolecules.
  • The findings contribute to the advancement of SERS-based sensing technologies.