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Related Experiment Video

Updated: May 2, 2026

Author Spotlight: Single-Molecule Surface-Enhanced Raman Scattering Measurements Enabled by Plasmonic DNA Origami Nanoantennas
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Surface-enhanced Raman scattering plasmonic enhancement using DNA origami-based complex metallic nanostructures.

M Pilo-Pais1, A Watson, S Demers

  • 1Department of Physics, Duke University , Durham, North Carolina 27708, United States.

Nano Letters
|March 21, 2014
PubMed
Summary

DNA origami enables precise placement of gold nanoparticles to create surface-enhanced Raman scattering (SERS) substrates. These engineered substrates generate "hot spots" for significantly enhanced molecular detection in spectroscopy.

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Area of Science:

  • Nanotechnology
  • Materials Science
  • Spectroscopy

Background:

  • DNA origami is a nanoscale self-assembly technique for precise matter positioning.
  • Surface-enhanced Raman scattering (SERS) relies on plasmonic nanostructures to amplify molecular signals.
  • Developing rationally designed SERS substrates with controlled hot spots is crucial for sensitive molecular detection.

Purpose of the Study:

  • To engineer novel SERS substrates using DNA origami templates.
  • To investigate the role of interparticle hot spots in Raman signal enhancement.
  • To demonstrate the utility of DNA origami in assembling plasmonic structures for spectroscopy.

Main Methods:

  • Utilizing DNA origami scaffolds to direct the precise placement of gold nanoparticles.
  • Enlarging nanoparticles via solution-based metal deposition to create interparticle gaps.
  • Employing Raman spectroscopy to measure signal enhancement from attached molecules.
  • Mapping hot spot distribution by observing molecular degradation under electric fields.

Main Results:

  • DNA origami-templated assemblies exhibited significant Raman signal enhancement compared to control samples.
  • The enhanced signal originated from electromagnetic "hot spots" between adjacent nanoparticles.
  • Raman molecules successfully mapped the distribution of these hot spots.
  • Demonstrated selective nanoparticle placement and controlled assembly using DNA origami.

Conclusions:

  • DNA origami provides a powerful platform for rationally designing and assembling plasmonic nanostructures.
  • This method enables the creation of highly efficient SERS substrates with engineered hot spots.
  • The technique holds promise for advancing molecular spectroscopy and sensing applications.