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Related Experiment Video

Updated: Dec 14, 2025

Utilization of Plasmonic and Photonic Crystal Nanostructures for Enhanced Micro- and Nanoparticle Manipulation
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Controlling Optically Driven Atomic Migration Using Crystal-Facet Control in Plasmonic Nanocavities.

Angelos Xomalis1, Rohit Chikkaraddy1, Eitan Oksenberg2

  • 1NanoPhotonics Centre, Cavendish Laboratory, Department of Physics, JJ Thompson Avenue, University of Cambridge, Cambridge CB3 0HE, United Kingdom.

ACS Nano
|July 21, 2020
PubMed
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This study introduces a new method using crystal facets to stabilize plasmonic nanoconstructs against light-induced damage. This enhanced stability enables sensitive molecular detection and advanced nanoscale surface science applications.

Area of Science:

  • Nanotechnology and Materials Science
  • Surface Science
  • Plasmonics

Background:

  • Plasmonic nanoconstructs confine light for applications like biosensing and medical imaging.
  • Light exposure, even at low intensities, can cause structural changes in metallic nanoparticles, limiting their stability.
  • Existing microscopy techniques can perturb the atomic structures being studied.

Purpose of the Study:

  • To develop a robust and simple technique to enhance the stability of plasmonic nanoconstructs.
  • To prevent light-induced atomic hopping on nanoparticle surfaces.
  • To enable sensitive optical measurements without perturbing atomic restructurings.

Main Methods:

  • Exploiting crystal facets and their atomic boundaries to prevent atomic hopping.
Keywords:
SERSatomic hoppingcrystal facetnano-opticsnanocavitypicocavitysingle-molecule

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  • Utilizing elastic and inelastic light scattering to analyze the influence of crystal habit.
  • Comparing the stability of {100} facets with steep inter-facet angles to spherical nanoparticles.

    • Main Results:

    • Demonstrated increased stability for {100} facets with steep inter-facet angles.
    • Observed that spherical nanoparticles with multiple atomic steps and shallow curvature are less stable.
    • Showcased the ability to perform Raman scattering on molecules with low cross-sections without charging or adatom binding effects.

    Conclusions:

    • Crystal facet engineering provides a method to create highly stable plasmonic nanoconstructs.
    • This technique overcomes limitations of light-induced structural changes, enabling long-term optical measurements.
    • The stable nanoconstructs facilitate advanced applications in nanoscale surface science, photocatalysis, and molecular electronics.