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Soft UV nanoimprint lithography-designed highly sensitive substrates for SERS detection.

Maximilien Cottat1, Nathalie Lidgi-Guigui, Inga Tijunelyte

  • 1CSPBAT (UMR 7244), CNRS-Université Paris 13, 74 rue Marcel Cachin, 93017, Bobigny, France, maximilien.cottat@univ-paris13.fr.

Nanoscale Research Letters
|June 20, 2015
PubMed
Summary

Soft UV nanoimprint lithography creates sensitive, millimeter-sized substrates for surface-enhanced Raman scattering (SERS) detection. This method enables rapid, reproducible SERS biosensing with high specificity, detecting as few as 4x10^6 avidin molecules.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Biophysics

Background:

  • Surface-enhanced Raman scattering (SERS) offers high sensitivity for molecular detection.
  • Developing reproducible and scalable SERS substrates remains a challenge.
  • Plasmonic nanostructures are key components for enhancing SERS signals.

Purpose of the Study:

  • To develop a reproducible and scalable method for fabricating sensitive SERS substrates.
  • To utilize soft UV nanoimprint lithography (UV-NIL) for creating plasmonic nanostructures.
  • To demonstrate the efficacy of these substrates for SERS biosensing.

Main Methods:

  • Soft UV nanoimprint lithography (UV-NIL) was employed to fabricate gold nanocylinders (GNCs).
  • The developed substrates were millimeter-sized and designed for SERS detection.
  • The sensitivity and specificity of the GNC substrates were evaluated using avidin detection.

Main Results:

  • Reproducible, millimeter-sized SERS substrates were successfully fabricated using UV-NIL.
  • Gold nanocylinders (GNCs) demonstrated high sensitivity and specificity as sensing surfaces.
  • Detection of less than 4 × 10^6 avidin molecules was achieved, contributing to the SERS signal.

Conclusions:

  • Soft UV-NIL is an effective technique for rapid, reproducible fabrication of sensitive SERS substrates.
  • The developed GNC-based substrates are suitable for high-performance SERS biosensing.
  • This approach facilitates sensitive molecular detection on a millimeter scale.