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The Electromagnetic Spectrum02:37

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The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
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Updated: Jun 20, 2026

Fabrication of Periodic Gold Nanocup Arrays Using Colloidal Lithography
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Rhodium nanospheres for ultraviolet and visible plasmonics.

David Muñeton Arboleda1,2, Vito Coviello1, Arianna Palumbo1

  • 1Department of Chemical Sciences, University of Padova, Padova, Italy. vincenzo.amendola@unipd.it.

Nanoscale Horizons
|November 19, 2024
PubMed
Summary

Rhodium nanoparticles (NPs) were synthesized using a green laser method, offering superior stability and plasmonic properties comparable to gold and silver. These rhodium NPs show promise for UV and visible plasmonics, sensing, and catalysis.

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Area of Science:

  • Plasmonics
  • Nanomaterials Science
  • Materials Chemistry

Background:

  • Gold and silver nanostructures are extensively studied plasmonic materials.
  • Rhodium's plasmonic, chemical, and physical properties are underexplored.
  • High cohesive energy of rhodium poses challenges for nanosphere synthesis.

Purpose of the Study:

  • To synthesize and characterize spherical rhodium nanoparticles (NPs) in the 20-40 nm range.
  • To investigate the plasmonic, chemical, and physical properties of these rhodium NPs.
  • To explore the potential applications of rhodium NPs in UV and visible plasmonics.

Main Methods:

  • Green, one-step laser ablation in liquid for rhodium nanosphere synthesis.
  • Characterization of localized surface plasmon (LSP) resonance in the UV range (195-255 nm).
  • Evaluation of surface binding, chemical stability, and physical robustness.

Main Results:

  • Successful synthesis of 20-40 nm rhodium nanospheres.
  • Localized surface plasmon resonance observed in the UV spectral range.
  • Enhanced visible absorption upon NP clustering.
  • Rhodium NPs exhibit excellent chemical and thermal stability, superior to gold and silver.
  • Plasmonic performance comparable to gold and silver NPs, with blue-shifted features.
  • Demonstrated utility as optical nanosensors and in surface-enhanced Raman scattering (SERS).

Conclusions:

  • Rhodium nanoparticles are a viable alternative to gold and silver for plasmonic applications.
  • Their superior stability and tunable plasmonic response open avenues for UV/visible plasmonics.
  • Potential applications include sensing, SERS, plasmon-enhanced catalysis, and chiroplasmonics.