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Related Experiment Video

Updated: May 15, 2026

Fabrication of polydimethylsiloxane (PDMS)-Based Flexible Surface-Enhanced Raman Scattering (SERS) Substrate for Ultrasensitive Detection
03:33

Fabrication of polydimethylsiloxane (PDMS)-Based Flexible Surface-Enhanced Raman Scattering (SERS) Substrate for Ultrasensitive Detection

Published on: November 17, 2023

Shape control of Ag nanostructures for practical SERS substrates.

Tae Yoon Jeon1, Sung-Gyu Park, Su Yeon Lee

  • 1National Creative Research Initiative Center for Integrated Optofluidic Systems, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon, 305-701, Korea.

ACS Applied Materials & Interfaces
|January 4, 2013
PubMed
Summary

Researchers developed highly ordered silver nanostructured arrays for surface-enhanced Raman scattering (SERS) sensing. These controllable substrates enable sensitive detection of low-concentration analytes, offering a practical platform for chemical sensing applications.

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Tracking Electrochemistry on Single Nanoparticles with Surface-Enhanced Raman Scattering Spectroscopy and Microscopy

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Surface-enhanced Raman scattering (SERS) requires precisely engineered nanostructures to enhance weak Raman signals.
  • Existing SERS substrates often lack control over nanostructure geometry and scalability.

Purpose of the Study:

  • To develop large-area, highly ordered silver nanostructured arrays with tunable geometrical features for SERS applications.
  • To investigate the correlation between nanostructure morphology and SERS activity.
  • To demonstrate the practical utility of these substrates for sensitive analyte detection.

Main Methods:

  • Fabrication of Ag-nanostructured arrays on SU-8 using self-assembly of inorganic particles, particle embedding, and Ag vapor deposition.
  • Control over nanogap size (60-190 nm) by adjusting embedding time.
  • Creation of triangular Ag nanoplates on nanopillar arrays via controlled dry etching.
  • Verification of SERS activity using benzenethiol detection.
  • Simulation of electric field distribution using finite-difference time-domain (FDTD) methodology.

Main Results:

  • Achieved large-area, highly ordered Ag-nanostructured arrays with controllable geometries (hole arrays, bowl-shaped arrays, triangular nanoplates on nanopillars).
  • Demonstrated precise control over nanogap dimensions and nanostructure morphology (size, sharpness).
  • Successfully detected low concentrations of benzenethiol, confirming high SERS sensitivity.
  • FDTD simulations correlated nanostructure geometry with enhanced electric fields.

Conclusions:

  • The developed Ag-nanostructured arrays serve as highly sensitive and controllable SERS-active substrates.
  • The fabrication method allows for simple shape-controllability, enabling practical SERS-based sensing platforms.
  • These substrates show significant potential for various chemical and biological sensing applications.