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Updated: Jan 5, 2026

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
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Tunable plasmonic HfN nanoparticles and arrays.

Sven H C Askes1, Nick J Schilder1, Erwin Zoethout2

  • 1Center for Nanophotonics, AMOLF, Science Park 104, 1098 XG Amsterdam, The Netherlands. e.garnett@amolf.nl.

Nanoscale
|October 19, 2019
PubMed
Summary

Researchers fabricated tunable plasmonic hafnium nitride (HfN) nanoparticles, a robust alternative to gold and silver. These nanoparticles exhibit surface plasmon resonances, opening doors for durable plasmonically-powered applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Plasmonics

Background:

  • Hafnium nitride (HfN) is a refractory material with potential for visible-range plasmonics.
  • HfN offers advantages like high melting point, chemical stability, and hardness over traditional plasmonic materials.
  • Research on HfN nanoparticles and their plasmonic properties is emerging.

Purpose of the Study:

  • To fabricate tunable plasmonic hafnium nitride (HfN) nanoparticles.
  • To experimentally demonstrate the plasmonic potential of HfN nanoparticles.
  • To explore HfN nanoparticles for robust plasmonically-powered applications.

Main Methods:

  • Fabrication of high-quality HfN thin films.
  • Milling of HfN nanorods and nanotriangles using a focused ion beam.

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  • Characterization of plasmon resonances using cathodoluminescence mapping.
  • Preparation of HfN nanoparticle arrays via electron-beam lithography.

    • Main Results:

    • Ellipsometry confirmed the plasmonic potential of HfN thin films.
    • Fabricated HfN nanostructures exhibited clear surface plasmon resonances.
    • Electron-beam lithography successfully produced HfN nanoparticle arrays with plasmonic properties.

    Conclusions:

    • Tunable plasmonic HfN nanoparticles can be fabricated using focused ion beam milling and electron-beam lithography.
    • HfN nanoparticles demonstrate significant plasmonic potential.
    • These findings support the use of HfN nanoparticles in demanding plasmonic applications requiring material robustness.