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Related Experiment Video

Updated: Oct 12, 2025

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
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Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Published on: May 28, 2016

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Polyhedral plasmonic nanoclusters through multi-step colloidal chemistry.

Nabila Tanjeem1, Cyril Chomette, Nicholas B Schade

  • 1Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA. vnm@seas.harvard.edu.

Materials Horizons
|November 25, 2021
PubMed
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This summary is machine-generated.

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Researchers developed a new colloidal synthesis method for creating plasmonic metamolecules. This technique precisely controls nanostructure morphology for tunable optical properties in metafluids.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Plasmonics

Background:

  • Plasmonic metamolecules are crucial for metafluids used in imaging and optical communications.
  • Precise control over metamolecule morphology is essential for predictable optical responses.
  • Existing methods struggle with the nanometer-scale precision required for metal coating thickness and inter-metal distances.

Purpose of the Study:

  • To introduce a novel multi-step colloidal synthesis approach for fabricating plasmonic metamolecules.
  • To demonstrate precise control over metamolecule morphology at the nanoscale.
  • To enable the bulk production of metamolecules with reproducible plasmonic resonances.

Main Methods:

  • Utilized seeded-growth emulsion polymerization to create silica-coated polystyrene sphere clusters.

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Last Updated: Oct 12, 2025

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  • Developed a dimpled template by overgrowing silica and removing polystyrene.
  • Employed a multi-step process involving satellite attachment and gold coating for metamolecule fabrication.
  • Applied single-cluster spectroscopy for resonance analysis.

    • Main Results:

    • Achieved reproducible plasmonic resonances across individual metamolecule clusters.
    • Demonstrated nanometer-scale precision in controlling distances between metallic surfaces via the synthesis method.
    • Validated the theoretical predictions of the optical response based on controlled morphology.

    Conclusions:

    • The multi-step colloidal synthesis approach offers precise control over plasmonic metamolecule morphology.
    • This method facilitates the bulk production of metamolecules, analogous to traditional chemical synthesis.
    • The findings pave the way for advanced applications in optical communications and imaging using metafluids.