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Related Experiment Video

Updated: May 22, 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

Flexible and mechanical strain resistant large area SERS active substrates.

J P Singh1, HsiaoYun Chu, Justin Abell

  • 1Department of Infectious Diseases, Nanoscale Science and Engineering Center, University of Georgia, Athens, GA 30602, USA. jpsingh@physics.iitd.ac.in

Nanoscale
|May 1, 2012
PubMed
Summary

Researchers developed cost-effective, flexible surface-enhanced Raman scattering (SERS) substrates using oblique angle deposition. These substrates maintain performance under significant tensile strain, showing promise for practical biosensing applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Spectroscopy

Background:

  • Surface-enhanced Raman scattering (SERS) requires robust substrates for reliable chemical detection.
  • Existing SERS substrates often lack mechanical flexibility, limiting their application in dynamic environments.
  • Developing large-area, uniform, and cost-effective SERS substrates is crucial for widespread adoption.

Purpose of the Study:

  • To report a facile and cost-effective method for synthesizing flexible SERS substrates.
  • To investigate the mechanical stability and SERS performance of these novel substrates under strain.
  • To demonstrate the potential of these flexible SERS substrates in biosensing applications.

Main Methods:

  • Utilized oblique angle deposition (OAD) to create tilted silver nanocolumnar films on flexible substrates (PDMS and PET).
  • Characterized the morphology and uniformity of the nanocolumnar films.
  • Evaluated SERS enhancement activity using trans-1,2-bis(4-pyridyl) ethylene (BPE) as a probe molecule.
  • Performed in situ SERS measurements under varying tensile and bending strain conditions.

Main Results:

  • Synthesized flexible SERS substrates with uniform, 1 μm long, tilted silver nanocolumns.
  • Demonstrated that substrates maintain SERS performance up to 30% tensile strain (ε).
  • Observed a 13% decrease in SERS performance under similar bending strain.
  • Showcased stable SERS intensity over 100 cycles at 10% tensile strain on PDMS substrates.

Conclusions:

  • Flexible SERS substrates synthesized via OAD offer excellent mechanical robustness, particularly under tensile strain.
  • These disposable and flexible substrates are suitable for integration with biological substances.
  • The developed substrates present a practical and novel approach for advancing biosensing technologies.