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Related Experiment Video

Updated: May 8, 2026

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

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Tunable SERS using gold nanoaggregates on an elastomeric substrate.

M Kamal Hossain1, Geoff R Willmott, Pablo G Etchegoin

  • 1The MacDiarmid Institute for Advanced Materials and Nanotechnology, New Zealand. geoff.willmott@callaghaninnovation.govt.nz.

Nanoscale
|August 21, 2013
PubMed
Summary

Researchers developed a stretchable substrate with gold nanoparticles for enhanced Raman spectroscopy. The substrate

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Spectroscopy

Background:

  • Surface-enhanced Raman scattering (SERS) offers high sensitivity for molecular detection.
  • Developing easily fabricated and tunable SERS substrates is crucial for advanced applications.

Purpose of the Study:

  • To investigate the self-assembly of gold nanoparticles on a stretchable membrane.
  • To evaluate this membrane as a substrate for far-field confocal Raman measurements.
  • To understand how substrate strain affects SERS performance.

Main Methods:

  • Self-assembly of colloidal gold nanoparticles onto an elastomeric membrane.
  • Fabrication of a SERS substrate.
  • Characterization using atomic force microscopy (AFM).

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Last Updated: May 8, 2026

Fabrication of polydimethylsiloxane (PDMS)-Based Flexible Surface-Enhanced Raman Scattering (SERS) Substrate for Ultrasensitive Detection
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  • Far-field confocal Raman spectroscopy measurements under varying strain conditions.

    • Main Results:

    • Achieved SERS enhancement factors of 10^6 to 10^7.
    • Observed that nanoparticle strain is approximately half the applied macroscopic strain.
    • Found SERS intensity is maximized at rest and decreases with stretching.
    • Determined resting interparticle gaps of 11 nm or 16 nm based on theoretical models.

    Conclusions:

    • The stretchable gold nanoparticle-coated membrane is a promising SERS substrate.
    • The study provides insights into the relationship between substrate strain and SERS signal.
    • This work facilitates facile sample fabrication and in situ tuning for SERS applications.